/* GNU/Linux native-dependent code common to multiple platforms.
- Copyright (C) 2001-2018 Free Software Foundation, Inc.
+ Copyright (C) 2001-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "target.h"
#include "nat/linux-nat.h"
#include "nat/linux-waitpid.h"
-#include "gdb_wait.h"
+#include "gdbsupport/gdb_wait.h"
#include <unistd.h>
#include <sys/syscall.h>
#include "nat/gdb_ptrace.h"
#include "nat/linux-osdata.h"
#include "linux-tdep.h"
#include "symfile.h"
-#include "agent.h"
+#include "gdbsupport/agent.h"
#include "tracepoint.h"
-#include "buffer.h"
+#include "gdbsupport/buffer.h"
#include "target-descriptions.h"
-#include "filestuff.h"
+#include "gdbsupport/filestuff.h"
#include "objfiles.h"
#include "nat/linux-namespaces.h"
-#include "fileio.h"
-
-#ifndef SPUFS_MAGIC
-#define SPUFS_MAGIC 0x23c9b64e
-#endif
+#include "gdbsupport/fileio.h"
+#include "gdbsupport/scope-exit.h"
+#include "gdbsupport/gdb-sigmask.h"
/* This comment documents high-level logic of this file.
#define O_LARGEFILE 0
#endif
+struct linux_nat_target *linux_target;
+
/* Does the current host support PTRACE_GETREGSET? */
enum tribool have_ptrace_getregset = TRIBOOL_UNKNOWN;
-/* The single-threaded native GNU/Linux target_ops. We save a pointer for
- the use of the multi-threaded target. */
-static struct target_ops *linux_ops;
-static struct target_ops linux_ops_saved;
-
-/* The method to call, if any, when a new thread is attached. */
-static void (*linux_nat_new_thread) (struct lwp_info *);
-
-/* The method to call, if any, when a thread is destroyed. */
-static void (*linux_nat_delete_thread) (struct arch_lwp_info *);
-
-/* The method to call, if any, when a new fork is attached. */
-static linux_nat_new_fork_ftype *linux_nat_new_fork;
-
-/* The method to call, if any, when a process is no longer
- attached. */
-static linux_nat_forget_process_ftype *linux_nat_forget_process_hook;
-
-/* Hook to call prior to resuming a thread. */
-static void (*linux_nat_prepare_to_resume) (struct lwp_info *);
-
-/* The method to call, if any, when the siginfo object needs to be
- converted between the layout returned by ptrace, and the layout in
- the architecture of the inferior. */
-static int (*linux_nat_siginfo_fixup) (siginfo_t *,
- gdb_byte *,
- int);
-
-/* The saved to_xfer_partial method, inherited from inf-ptrace.c.
- Called by our to_xfer_partial. */
-static target_xfer_partial_ftype *super_xfer_partial;
-
-/* The saved to_close method, inherited from inf-ptrace.c.
- Called by our to_close. */
-static void (*super_close) (struct target_ops *);
-
static unsigned int debug_linux_nat;
static void
show_debug_linux_nat (struct ui_file *file, int from_tty,
static int kill_lwp (int lwpid, int signo);
-static int stop_callback (struct lwp_info *lp, void *data);
-static int resume_stopped_resumed_lwps (struct lwp_info *lp, void *data);
+static int stop_callback (struct lwp_info *lp);
static void block_child_signals (sigset_t *prev_mask);
static void restore_child_signals_mask (sigset_t *prev_mask);
static int lwp_status_pending_p (struct lwp_info *lp);
-static int sigtrap_is_event (int status);
-static int (*linux_nat_status_is_event) (int status) = sigtrap_is_event;
-
static void save_stop_reason (struct lwp_info *lp);
\f
return options;
}
-/* Initialize ptrace warnings and check for supported ptrace
- features given PID.
+/* Initialize ptrace and procfs warnings and check for supported
+ ptrace features given PID.
ATTACHED should be nonzero iff we attached to the inferior. */
static void
-linux_init_ptrace (pid_t pid, int attached)
+linux_init_ptrace_procfs (pid_t pid, int attached)
{
int options = linux_nat_ptrace_options (attached);
linux_enable_event_reporting (pid, options);
linux_ptrace_init_warnings ();
+ linux_proc_init_warnings ();
}
-static void
-linux_child_post_attach (struct target_ops *self, int pid)
+linux_nat_target::~linux_nat_target ()
+{}
+
+void
+linux_nat_target::post_attach (int pid)
{
- linux_init_ptrace (pid, 1);
+ linux_init_ptrace_procfs (pid, 1);
}
-static void
-linux_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
+void
+linux_nat_target::post_startup_inferior (ptid_t ptid)
{
- linux_init_ptrace (ptid_get_pid (ptid), 0);
+ linux_init_ptrace_procfs (ptid.pid (), 0);
}
/* Return the number of known LWPs in the tgid given by PID. */
struct lwp_info *lp;
for (lp = lwp_list; lp; lp = lp->next)
- if (ptid_get_pid (lp->ptid) == pid)
+ if (lp->ptid.pid () == pid)
count++;
return count;
}
-/* Call delete_lwp with prototype compatible for make_cleanup. */
+/* Deleter for lwp_info unique_ptr specialisation. */
-static void
-delete_lwp_cleanup (void *lp_voidp)
+struct lwp_deleter
{
- struct lwp_info *lp = (struct lwp_info *) lp_voidp;
+ void operator() (struct lwp_info *lwp) const
+ {
+ delete_lwp (lwp->ptid);
+ }
+};
- delete_lwp (lp->ptid);
-}
+/* A unique_ptr specialisation for lwp_info. */
+
+typedef std::unique_ptr<struct lwp_info, lwp_deleter> lwp_info_up;
/* Target hook for follow_fork. On entry inferior_ptid must be the
ptid of the followed inferior. At return, inferior_ptid will be
unchanged. */
-static int
-linux_child_follow_fork (struct target_ops *ops, int follow_child,
- int detach_fork)
+int
+linux_nat_target::follow_fork (int follow_child, int detach_fork)
{
if (!follow_child)
{
struct lwp_info *child_lp = NULL;
- int status = W_STOPCODE (0);
int has_vforked;
ptid_t parent_ptid, child_ptid;
int parent_pid, child_pid;
== TARGET_WAITKIND_VFORKED);
parent_ptid = inferior_ptid;
child_ptid = inferior_thread ()->pending_follow.value.related_pid;
- parent_pid = ptid_get_lwp (parent_ptid);
- child_pid = ptid_get_lwp (child_ptid);
+ parent_pid = parent_ptid.lwp ();
+ child_pid = child_ptid.lwp ();
/* We're already attached to the parent, by default. */
child_lp = add_lwp (child_ptid);
/* Detach new forked process? */
if (detach_fork)
{
- struct cleanup *old_chain = make_cleanup (delete_lwp_cleanup,
- child_lp);
+ int child_stop_signal = 0;
+ bool detach_child = true;
+
+ /* Move CHILD_LP into a unique_ptr and clear the source pointer
+ to prevent us doing anything stupid with it. */
+ lwp_info_up child_lp_ptr (child_lp);
+ child_lp = nullptr;
- if (linux_nat_prepare_to_resume != NULL)
- linux_nat_prepare_to_resume (child_lp);
+ linux_target->low_prepare_to_resume (child_lp_ptr.get ());
/* When debugging an inferior in an architecture that supports
hardware single stepping on a kernel without commit
if (!gdbarch_software_single_step_p (target_thread_architecture
(parent_ptid)))
{
+ int status;
+
linux_disable_event_reporting (child_pid);
if (ptrace (PTRACE_SINGLESTEP, child_pid, 0, 0) < 0)
perror_with_name (_("Couldn't do single step"));
if (my_waitpid (child_pid, &status, 0) < 0)
perror_with_name (_("Couldn't wait vfork process"));
+ else
+ {
+ detach_child = WIFSTOPPED (status);
+ child_stop_signal = WSTOPSIG (status);
+ }
}
- if (WIFSTOPPED (status))
+ if (detach_child)
{
- int signo;
+ int signo = child_stop_signal;
- signo = WSTOPSIG (status);
if (signo != 0
&& !signal_pass_state (gdb_signal_from_host (signo)))
signo = 0;
ptrace (PTRACE_DETACH, child_pid, 0, signo);
}
-
- do_cleanups (old_chain);
}
else
{
}
\f
-static int
-linux_child_insert_fork_catchpoint (struct target_ops *self, int pid)
+int
+linux_nat_target::insert_fork_catchpoint (int pid)
{
return !linux_supports_tracefork ();
}
-static int
-linux_child_remove_fork_catchpoint (struct target_ops *self, int pid)
+int
+linux_nat_target::remove_fork_catchpoint (int pid)
{
return 0;
}
-static int
-linux_child_insert_vfork_catchpoint (struct target_ops *self, int pid)
+int
+linux_nat_target::insert_vfork_catchpoint (int pid)
{
return !linux_supports_tracefork ();
}
-static int
-linux_child_remove_vfork_catchpoint (struct target_ops *self, int pid)
+int
+linux_nat_target::remove_vfork_catchpoint (int pid)
{
return 0;
}
-static int
-linux_child_insert_exec_catchpoint (struct target_ops *self, int pid)
+int
+linux_nat_target::insert_exec_catchpoint (int pid)
{
return !linux_supports_tracefork ();
}
-static int
-linux_child_remove_exec_catchpoint (struct target_ops *self, int pid)
+int
+linux_nat_target::remove_exec_catchpoint (int pid)
{
return 0;
}
-static int
-linux_child_set_syscall_catchpoint (struct target_ops *self,
- int pid, bool needed, int any_count,
- gdb::array_view<const int> syscall_counts)
+int
+linux_nat_target::set_syscall_catchpoint (int pid, bool needed, int any_count,
+ gdb::array_view<const int> syscall_counts)
{
if (!linux_supports_tracesysgood ())
return 1;
lwp_info_hash (const void *ap)
{
const struct lwp_info *lp = (struct lwp_info *) ap;
- pid_t pid = ptid_get_lwp (lp->ptid);
+ pid_t pid = lp->ptid.lwp ();
return iterative_hash_object (pid, 0);
}
const struct lwp_info *entry = (const struct lwp_info *) a;
const struct lwp_info *element = (const struct lwp_info *) b;
- return ptid_get_lwp (entry->ptid) == ptid_get_lwp (element->ptid);
+ return entry->ptid.lwp () == element->ptid.lwp ();
}
/* Create the lwp_lwpid_htab hash table. */
\f
-/* Original signal mask. */
-static sigset_t normal_mask;
-
/* Signal mask for use with sigsuspend in linux_nat_wait, initialized in
_initialize_linux_nat. */
static sigset_t suspend_mask;
if (!sigismember (&blocked_mask, SIGCHLD))
sigaddset (&blocked_mask, SIGCHLD);
- sigprocmask (SIG_BLOCK, &blocked_mask, prev_mask);
+ gdb_sigmask (SIG_BLOCK, &blocked_mask, prev_mask);
}
/* Restore child signals mask, previously returned by
static void
restore_child_signals_mask (sigset_t *prev_mask)
{
- sigprocmask (SIG_SETMASK, prev_mask, NULL);
+ gdb_sigmask (SIG_SETMASK, prev_mask, NULL);
}
/* Mask of signals to pass directly to the inferior. */
static sigset_t pass_mask;
/* Update signals to pass to the inferior. */
-static void
-linux_nat_pass_signals (struct target_ops *self,
- int numsigs, unsigned char *pass_signals)
+void
+linux_nat_target::pass_signals
+ (gdb::array_view<const unsigned char> pass_signals)
{
int signo;
for (signo = 1; signo < NSIG; signo++)
{
int target_signo = gdb_signal_from_host (signo);
- if (target_signo < numsigs && pass_signals[target_signo])
+ if (target_signo < pass_signals.size () && pass_signals[target_signo])
sigaddset (&pass_mask, signo);
}
}
\f
/* Prototypes for local functions. */
-static int stop_wait_callback (struct lwp_info *lp, void *data);
-static char *linux_child_pid_to_exec_file (struct target_ops *self, int pid);
-static int resume_stopped_resumed_lwps (struct lwp_info *lp, void *data);
+static int stop_wait_callback (struct lwp_info *lp);
+static int resume_stopped_resumed_lwps (struct lwp_info *lp, const ptid_t wait_ptid);
static int check_ptrace_stopped_lwp_gone (struct lwp_info *lp);
\f
lwp_free (struct lwp_info *lp)
{
/* Let the arch specific bits release arch_lwp_info. */
- if (linux_nat_delete_thread != NULL)
- linux_nat_delete_thread (lp->arch_private);
- else
- gdb_assert (lp->arch_private == NULL);
+ linux_target->low_delete_thread (lp->arch_private);
xfree (lp);
}
struct lwp_info *lp = (struct lwp_info *) *slot;
int pid = *(int *) info;
- if (ptid_get_pid (lp->ptid) == pid)
+ if (lp->ptid.pid () == pid)
{
htab_clear_slot (lwp_lwpid_htab, slot);
lwp_list_remove (lp);
{
struct lwp_info *lp;
- gdb_assert (ptid_lwp_p (ptid));
+ gdb_assert (ptid.lwp_p ());
lp = XNEW (struct lwp_info);
clients of this callback take the opportunity to install
watchpoints in the new thread. We don't do this for the first
thread though. See add_initial_lwp. */
- if (linux_nat_new_thread != NULL)
- linux_nat_new_thread (lp);
+ linux_target->low_new_thread (lp);
return lp;
}
int lwp;
struct lwp_info dummy;
- if (ptid_lwp_p (ptid))
- lwp = ptid_get_lwp (ptid);
+ if (ptid.lwp_p ())
+ lwp = ptid.lwp ();
else
- lwp = ptid_get_pid (ptid);
+ lwp = ptid.pid ();
- dummy.ptid = ptid_build (0, lwp, 0);
+ dummy.ptid = ptid_t (0, lwp, 0);
lp = (struct lwp_info *) htab_find (lwp_lwpid_htab, &dummy);
return lp;
}
struct lwp_info *
iterate_over_lwps (ptid_t filter,
- iterate_over_lwps_ftype callback,
- void *data)
+ gdb::function_view<iterate_over_lwps_ftype> callback)
{
struct lwp_info *lp, *lpnext;
{
lpnext = lp->next;
- if (ptid_match (lp->ptid, filter))
+ if (lp->ptid.matches (filter))
{
- if ((*callback) (lp, data) != 0)
+ if (callback (lp) != 0)
return lp;
}
}
{
struct lwp_info *lp;
- purge_lwp_list (ptid_get_pid (inferior_ptid));
+ purge_lwp_list (inferior_ptid.pid ());
lp = add_lwp (new_ptid);
lp->stopped = 1;
if (th)
{
if (print_thread_events)
- printf_unfiltered (_("[%s exited]\n"), target_pid_to_str (lp->ptid));
+ printf_unfiltered (_("[%s exited]\n"),
+ target_pid_to_str (lp->ptid).c_str ());
- delete_thread (lp->ptid);
+ delete_thread (th);
}
delete_lwp (lp->ptid);
static int
linux_nat_post_attach_wait (ptid_t ptid, int *signalled)
{
- pid_t new_pid, pid = ptid_get_lwp (ptid);
+ pid_t new_pid, pid = ptid.lwp ();
int status;
if (linux_proc_pid_is_stopped (pid))
return status;
}
-static void
-linux_nat_create_inferior (struct target_ops *ops,
- const char *exec_file, const std::string &allargs,
- char **env, int from_tty)
+void
+linux_nat_target::create_inferior (const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty)
{
maybe_disable_address_space_randomization restore_personality
(disable_randomization);
we have to mask the async mode. */
/* Make sure we report all signals during startup. */
- linux_nat_pass_signals (ops, 0, NULL);
+ pass_signals ({});
- linux_ops->to_create_inferior (ops, exec_file, allargs, env, from_tty);
+ inf_ptrace_target::create_inferior (exec_file, allargs, env, from_tty);
}
/* Callback for linux_proc_attach_tgid_threads. Attach to PTID if not
lp = find_lwp_pid (ptid);
if (lp == NULL)
{
- int lwpid = ptid_get_lwp (ptid);
+ int lwpid = ptid.lwp ();
if (ptrace (PTRACE_ATTACH, lwpid, 0, 0) < 0)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"PTRACE_ATTACH %s, 0, 0 (OK)\n",
- target_pid_to_str (ptid));
+ target_pid_to_str (ptid).c_str ());
lp = add_lwp (ptid);
return 0;
}
-static void
-linux_nat_attach (struct target_ops *ops, const char *args, int from_tty)
+void
+linux_nat_target::attach (const char *args, int from_tty)
{
struct lwp_info *lp;
int status;
ptid_t ptid;
/* Make sure we report all signals during attach. */
- linux_nat_pass_signals (ops, 0, NULL);
+ pass_signals ({});
- TRY
+ try
{
- linux_ops->to_attach (ops, args, from_tty);
+ inf_ptrace_target::attach (args, from_tty);
}
- CATCH (ex, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &ex)
{
pid_t pid = parse_pid_to_attach (args);
std::string reason = linux_ptrace_attach_fail_reason (pid);
if (!reason.empty ())
- throw_error (ex.error, "warning: %s\n%s", reason.c_str (), ex.message);
+ throw_error (ex.error, "warning: %s\n%s", reason.c_str (),
+ ex.what ());
else
- throw_error (ex.error, "%s", ex.message);
+ throw_error (ex.error, "%s", ex.what ());
}
- END_CATCH
/* The ptrace base target adds the main thread with (pid,0,0)
format. Decorate it with lwp info. */
- ptid = ptid_build (ptid_get_pid (inferior_ptid),
- ptid_get_pid (inferior_ptid),
- 0);
+ ptid = ptid_t (inferior_ptid.pid (),
+ inferior_ptid.pid (),
+ 0);
thread_change_ptid (inferior_ptid, ptid);
/* Add the initial process as the first LWP to the list. */
internal_error (__FILE__, __LINE__,
_("unexpected status %d for PID %ld"),
- status, (long) ptid_get_lwp (ptid));
+ status, (long) ptid.lwp ());
}
lp->stopped = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LNA: waitpid %ld, saving status %s\n",
- (long) ptid_get_pid (lp->ptid), status_to_str (status));
+ (long) lp->ptid.pid (), status_to_str (status));
lp->status = status;
of threads/LWPs, and those structures may well be corrupted.
Note that once thread_db is loaded, we'll still use it to list
threads and associate pthread info with each LWP. */
- linux_proc_attach_tgid_threads (ptid_get_pid (lp->ptid),
+ linux_proc_attach_tgid_threads (lp->ptid.pid (),
attach_proc_task_lwp_callback);
if (target_can_async_p ())
signo = GDB_SIGNAL_0; /* a pending ptrace event, not a real signal. */
else if (lp->status)
signo = gdb_signal_from_host (WSTOPSIG (lp->status));
- else if (target_is_non_stop_p () && !is_executing (lp->ptid))
+ else
{
struct thread_info *tp = find_thread_ptid (lp->ptid);
- if (tp->suspend.waitstatus_pending_p)
- signo = tp->suspend.waitstatus.value.sig;
- else
- signo = tp->suspend.stop_signal;
- }
- else if (!target_is_non_stop_p ())
- {
- struct target_waitstatus last;
- ptid_t last_ptid;
-
- get_last_target_status (&last_ptid, &last);
-
- if (ptid_get_lwp (lp->ptid) == ptid_get_lwp (last_ptid))
+ if (target_is_non_stop_p () && !tp->executing)
{
- struct thread_info *tp = find_thread_ptid (lp->ptid);
+ if (tp->suspend.waitstatus_pending_p)
+ signo = tp->suspend.waitstatus.value.sig;
+ else
+ signo = tp->suspend.stop_signal;
+ }
+ else if (!target_is_non_stop_p ())
+ {
+ ptid_t last_ptid;
+
+ get_last_target_status (&last_ptid, nullptr);
- signo = tp->suspend.stop_signal;
+ if (lp->ptid.lwp () == last_ptid.lwp ())
+ signo = tp->suspend.stop_signal;
}
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"GPT: lwp %s has no pending signal\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else if (!signal_pass_state (signo))
{
fprintf_unfiltered (gdb_stdlog,
"GPT: lwp %s had signal %s, "
"but it is in no pass state\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
gdb_signal_to_string (signo));
}
else
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"GPT: lwp %s has pending signal %s\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
gdb_signal_to_string (signo));
return gdb_signal_to_host (signo);
static void
detach_one_lwp (struct lwp_info *lp, int *signo_p)
{
- int lwpid = ptid_get_lwp (lp->ptid);
+ int lwpid = lp->ptid.lwp ();
int signo;
gdb_assert (lp->status == 0 || WIFSTOPPED (lp->status));
if (debug_linux_nat && lp->status)
fprintf_unfiltered (gdb_stdlog, "DC: Pending %s for %s on detach.\n",
strsignal (WSTOPSIG (lp->status)),
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
/* If there is a pending SIGSTOP, get rid of it. */
if (lp->signalled)
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"DC: Sending SIGCONT to %s\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
kill_lwp (lwpid, SIGCONT);
lp->signalled = 0;
/* Preparing to resume may try to write registers, and fail if the
lwp is zombie. If that happens, ignore the error. We'll handle
it below, when detach fails with ESRCH. */
- TRY
+ try
{
- if (linux_nat_prepare_to_resume != NULL)
- linux_nat_prepare_to_resume (lp);
+ linux_target->low_prepare_to_resume (lp);
}
- CATCH (ex, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &ex)
{
if (!check_ptrace_stopped_lwp_gone (lp))
- throw_exception (ex);
+ throw;
}
- END_CATCH
if (ptrace (PTRACE_DETACH, lwpid, 0, signo) < 0)
{
if (ret == -1)
{
warning (_("Couldn't reap LWP %d while detaching: %s"),
- lwpid, strerror (errno));
+ lwpid, safe_strerror (errno));
}
else if (!WIFEXITED (status) && !WIFSIGNALED (status))
{
}
else
{
- error (_("Can't detach %s: %s"), target_pid_to_str (lp->ptid),
+ error (_("Can't detach %s: %s"),
+ target_pid_to_str (lp->ptid).c_str (),
safe_strerror (save_errno));
}
}
{
fprintf_unfiltered (gdb_stdlog,
"PTRACE_DETACH (%s, %s, 0) (OK)\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
strsignal (signo));
}
}
static int
-detach_callback (struct lwp_info *lp, void *data)
+detach_callback (struct lwp_info *lp)
{
/* 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 (ptid_get_lwp (lp->ptid) != ptid_get_pid (lp->ptid))
+ if (lp->ptid.lwp () != lp->ptid.pid ())
detach_one_lwp (lp, NULL);
return 0;
}
-static void
-linux_nat_detach (struct target_ops *ops, inferior *inf, int from_tty)
+void
+linux_nat_target::detach (inferior *inf, int from_tty)
{
struct lwp_info *main_lwp;
int pid = inf->pid;
inferiors running. */
/* Stop all threads before detaching. ptrace requires that the
- thread is stopped to sucessfully detach. */
- iterate_over_lwps (pid_to_ptid (pid), stop_callback, NULL);
+ thread is stopped to successfully detach. */
+ iterate_over_lwps (ptid_t (pid), stop_callback);
/* ... and wait until all of them have reported back that
they're no longer running. */
- iterate_over_lwps (pid_to_ptid (pid), stop_wait_callback, NULL);
+ iterate_over_lwps (ptid_t (pid), stop_wait_callback);
- iterate_over_lwps (pid_to_ptid (pid), detach_callback, NULL);
+ iterate_over_lwps (ptid_t (pid), detach_callback);
/* Only the initial process should be left right now. */
gdb_assert (num_lwps (pid) == 1);
- main_lwp = find_lwp_pid (pid_to_ptid (pid));
+ main_lwp = find_lwp_pid (ptid_t (pid));
if (forks_exist_p ())
{
detach_one_lwp (main_lwp, &signo);
- inf_ptrace_detach_success (ops, inf);
+ detach_success (inf);
}
}
else
lp->stop_pc = 0;
- if (linux_nat_prepare_to_resume != NULL)
- linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, lp->ptid, step, signo);
+ linux_target->low_prepare_to_resume (lp);
+ linux_target->low_resume (lp->ptid, step, signo);
/* Successfully resumed. Clear state that no longer makes sense,
and mark the LWP as running. Must not do this before resuming
other than ptrace-stopped. */
/* Don't assume anything if /proc/PID/status can't be read. */
- if (linux_proc_pid_is_trace_stopped_nowarn (ptid_get_lwp (lp->ptid)) == 0)
+ if (linux_proc_pid_is_trace_stopped_nowarn (lp->ptid.lwp ()) == 0)
{
lp->stop_reason = TARGET_STOPPED_BY_NO_REASON;
lp->status = 0;
static void
linux_resume_one_lwp (struct lwp_info *lp, int step, enum gdb_signal signo)
{
- TRY
+ try
{
linux_resume_one_lwp_throw (lp, step, signo);
}
- CATCH (ex, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &ex)
{
if (!check_ptrace_stopped_lwp_gone (lp))
- throw_exception (ex);
+ throw;
}
- END_CATCH
}
/* Resume LP. */
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RC: Not resuming %s (vfork parent)\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else if (!lwp_status_pending_p (lp))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RC: Resuming sibling %s, %s, %s\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
(signo != GDB_SIGNAL_0
? strsignal (gdb_signal_to_host (signo))
: "0"),
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RC: Not resuming sibling %s (has pending)\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
}
else
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RC: Not resuming sibling %s (not stopped)\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
}
Resume LWP with the last stop signal, if it is in pass state. */
static int
-linux_nat_resume_callback (struct lwp_info *lp, void *except)
+linux_nat_resume_callback (struct lwp_info *lp, struct lwp_info *except)
{
enum gdb_signal signo = GDB_SIGNAL_0;
}
static int
-resume_clear_callback (struct lwp_info *lp, void *data)
+resume_clear_callback (struct lwp_info *lp)
{
lp->resumed = 0;
lp->last_resume_kind = resume_stop;
}
static int
-resume_set_callback (struct lwp_info *lp, void *data)
+resume_set_callback (struct lwp_info *lp)
{
lp->resumed = 1;
lp->last_resume_kind = resume_continue;
return 0;
}
-static void
-linux_nat_resume (struct target_ops *ops,
- ptid_t ptid, int step, enum gdb_signal signo)
+void
+linux_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo)
{
struct lwp_info *lp;
int resume_many;
fprintf_unfiltered (gdb_stdlog,
"LLR: Preparing to %s %s, %s, inferior_ptid %s\n",
step ? "step" : "resume",
- target_pid_to_str (ptid),
+ target_pid_to_str (ptid).c_str (),
(signo != GDB_SIGNAL_0
? strsignal (gdb_signal_to_host (signo)) : "0"),
- target_pid_to_str (inferior_ptid));
+ target_pid_to_str (inferior_ptid).c_str ());
/* A specific PTID means `step only this process id'. */
- resume_many = (ptid_equal (minus_one_ptid, ptid)
- || ptid_is_pid (ptid));
+ resume_many = (minus_one_ptid == ptid
+ || ptid.is_pid ());
/* Mark the lwps we're resuming as resumed. */
- iterate_over_lwps (ptid, resume_set_callback, NULL);
+ iterate_over_lwps (ptid, resume_set_callback);
/* See if it's the current inferior that should be handled
specially. */
}
if (resume_many)
- iterate_over_lwps (ptid, linux_nat_resume_callback, lp);
+ iterate_over_lwps (ptid, [=] (struct lwp_info *info)
+ {
+ return linux_nat_resume_callback (info, lp);
+ });
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLR: %s %s, %s (resume event thread)\n",
step ? "PTRACE_SINGLESTEP" : "PTRACE_CONT",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
(signo != GDB_SIGNAL_0
? strsignal (gdb_signal_to_host (signo)) : "0"));
{
struct target_waitstatus *ourstatus = &lp->waitstatus;
struct gdbarch *gdbarch = target_thread_architecture (lp->ptid);
- int syscall_number = (int) gdbarch_get_syscall_number (gdbarch, lp->ptid);
+ thread_info *thread = find_thread_ptid (lp->ptid);
+ int syscall_number = (int) gdbarch_get_syscall_number (gdbarch, thread);
if (stopping)
{
"for LWP %ld (stopping threads), "
"resuming with PTRACE_CONT for SIGSTOP\n",
syscall_number,
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
lp->syscall_state = TARGET_WAITKIND_IGNORE;
- ptrace (PTRACE_CONT, ptid_get_lwp (lp->ptid), 0, 0);
+ ptrace (PTRACE_CONT, lp->ptid.lwp (), 0, 0);
lp->stopped = 0;
return 1;
}
== TARGET_WAITKIND_SYSCALL_ENTRY
? "entry" : "return",
syscall_number,
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
return 0;
}
lp->syscall_state == TARGET_WAITKIND_SYSCALL_ENTRY
? "entry" : "return",
syscall_number,
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
}
else
{
"with no syscall catchpoints."
" %d for LWP %ld, ignoring\n",
syscall_number,
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
lp->syscall_state = TARGET_WAITKIND_IGNORE;
}
static int
linux_handle_extended_wait (struct lwp_info *lp, int status)
{
- int pid = ptid_get_lwp (lp->ptid);
+ int pid = lp->ptid.lwp ();
struct target_waitstatus *ourstatus = &lp->waitstatus;
int event = linux_ptrace_get_extended_event (status);
_("wait returned unexpected status 0x%x"), status);
}
- ourstatus->value.related_pid = ptid_build (new_pid, new_pid, 0);
+ ourstatus->value.related_pid = ptid_t (new_pid, new_pid, 0);
if (event == PTRACE_EVENT_FORK || event == PTRACE_EVENT_VFORK)
{
/* The arch-specific native code may need to know about new
forks even if those end up never mapped to an
inferior. */
- if (linux_nat_new_fork != NULL)
- linux_nat_new_fork (lp, new_pid);
+ linux_target->low_new_fork (lp, new_pid);
}
if (event == PTRACE_EVENT_FORK
- && linux_fork_checkpointing_p (ptid_get_pid (lp->ptid)))
+ && linux_fork_checkpointing_p (lp->ptid.pid ()))
{
/* Handle checkpointing by linux-fork.c here as a special
case. We don't want the follow-fork-mode or 'catch fork'
/* This won't actually modify the breakpoint list, but will
physically remove the breakpoints from the child. */
- detach_breakpoints (ptid_build (new_pid, new_pid, 0));
+ detach_breakpoints (ptid_t (new_pid, new_pid, 0));
/* Retain child fork in ptrace (stopped) state. */
if (!find_fork_pid (new_pid))
"from LWP %d, new child is LWP %ld\n",
pid, new_pid);
- new_lp = add_lwp (ptid_build (ptid_get_pid (lp->ptid), new_pid, 0));
+ new_lp = add_lwp (ptid_t (lp->ptid.pid (), new_pid, 0));
new_lp->stopped = 1;
new_lp->resumed = 1;
{
/* The process is not using thread_db. Add the LWP to
GDB's list. */
- target_post_attach (ptid_get_lwp (new_lp->ptid));
+ target_post_attach (new_lp->ptid.lwp ());
add_thread (new_lp->ptid);
}
fprintf_unfiltered (gdb_stdlog,
"LHEW: waitpid of new LWP %ld, "
"saving status %s\n",
- (long) ptid_get_lwp (new_lp->ptid),
+ (long) new_lp->ptid.lwp (),
status_to_str (status));
new_lp->status = status;
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LHEW: Got exec event from LWP %ld\n",
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
ourstatus->kind = TARGET_WAITKIND_EXECD;
ourstatus->value.execd_pathname
- = xstrdup (linux_child_pid_to_exec_file (NULL, pid));
+ = xstrdup (linux_proc_pid_to_exec_file (pid));
/* The thread that execed must have been resumed, but, when a
thread execs, it changes its tid to the tgid, and the old
fprintf_unfiltered (gdb_stdlog,
"LHEW: Got expected PTRACE_EVENT_"
"VFORK_DONE from LWP %ld: stopping\n",
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
ourstatus->kind = TARGET_WAITKIND_VFORK_DONE;
return 0;
fprintf_unfiltered (gdb_stdlog,
"LHEW: Got PTRACE_EVENT_VFORK_DONE "
"from LWP %ld: ignoring\n",
- ptid_get_lwp (lp->ptid));
+ lp->ptid.lwp ());
return 1;
}
for (;;)
{
- pid = my_waitpid (ptid_get_lwp (lp->ptid), &status, __WALL | WNOHANG);
+ pid = my_waitpid (lp->ptid.lwp (), &status, __WALL | WNOHANG);
if (pid == -1 && errno == ECHILD)
{
/* The thread has previously exited. We need to delete it
thread_dead = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog, "WL: %s vanished.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
if (pid != 0)
break;
Therefore always use WNOHANG with sigsuspend - it is equivalent to
waiting waitpid but linux_proc_pid_is_zombie is safe this way. */
- if (ptid_get_pid (lp->ptid) == ptid_get_lwp (lp->ptid)
- && linux_proc_pid_is_zombie (ptid_get_lwp (lp->ptid)))
+ if (lp->ptid.pid () == lp->ptid.lwp ()
+ && linux_proc_pid_is_zombie (lp->ptid.lwp ()))
{
thread_dead = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"WL: Thread group leader %s vanished.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
break;
}
if (!thread_dead)
{
- gdb_assert (pid == ptid_get_lwp (lp->ptid));
+ gdb_assert (pid == lp->ptid.lwp ());
if (debug_linux_nat)
{
fprintf_unfiltered (gdb_stdlog,
"WL: waitpid %s received %s\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
status_to_str (status));
}
if (WIFEXITED (status) || WIFSIGNALED (status))
{
if (report_thread_events
- || ptid_get_pid (lp->ptid) == ptid_get_lwp (lp->ptid))
+ || lp->ptid.pid () == lp->ptid.lwp ())
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog, "WL: LWP %d exited.\n",
- ptid_get_pid (lp->ptid));
+ lp->ptid.pid ());
/* If this is the leader exiting, it means the whole
process is gone. Store the status to report to the
thread_dead = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog, "WL: %s exited.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
}
if (lp->must_set_ptrace_flags)
{
- struct inferior *inf = find_inferior_pid (ptid_get_pid (lp->ptid));
+ struct inferior *inf = find_inferior_pid (lp->ptid.pid ());
int options = linux_nat_ptrace_options (inf->attach_flag);
- linux_enable_event_reporting (ptid_get_lwp (lp->ptid), options);
+ linux_enable_event_reporting (lp->ptid.lwp (), options);
lp->must_set_ptrace_flags = 0;
}
/* Send a SIGSTOP to LP. */
static int
-stop_callback (struct lwp_info *lp, void *data)
+stop_callback (struct lwp_info *lp)
{
if (!lp->stopped && !lp->signalled)
{
{
fprintf_unfiltered (gdb_stdlog,
"SC: kill %s **<SIGSTOP>**\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
errno = 0;
- ret = kill_lwp (ptid_get_lwp (lp->ptid), SIGSTOP);
+ ret = kill_lwp (lp->ptid.lwp (), SIGSTOP);
if (debug_linux_nat)
{
fprintf_unfiltered (gdb_stdlog,
void
linux_stop_lwp (struct lwp_info *lwp)
{
- stop_callback (lwp, NULL);
+ stop_callback (lwp);
}
/* See linux-nat.h */
linux_stop_and_wait_all_lwps (void)
{
/* Stop all LWP's ... */
- iterate_over_lwps (minus_one_ptid, stop_callback, NULL);
+ iterate_over_lwps (minus_one_ptid, stop_callback);
/* ... and wait until all of them have reported back that
they're no longer running. */
- iterate_over_lwps (minus_one_ptid, stop_wait_callback, NULL);
+ iterate_over_lwps (minus_one_ptid, stop_wait_callback);
}
/* See linux-nat.h */
linux_unstop_all_lwps (void)
{
iterate_over_lwps (minus_one_ptid,
- resume_stopped_resumed_lwps, &minus_one_ptid);
+ [] (struct lwp_info *info)
+ {
+ return resume_stopped_resumed_lwps (info, minus_one_ptid);
+ });
}
/* Return non-zero if LWP PID has a pending SIGINT. */
/* Set a flag in LP indicating that we should ignore its next SIGINT. */
static int
-set_ignore_sigint (struct lwp_info *lp, void *data)
+set_ignore_sigint (struct lwp_info *lp)
{
/* If a thread has a pending SIGINT, consume it; otherwise, set a
flag to consume the next one. */
if (!lp->ignore_sigint)
return;
- if (!linux_nat_has_pending_sigint (ptid_get_lwp (lp->ptid)))
+ if (!linux_nat_has_pending_sigint (lp->ptid.lwp ()))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"MCIS: Clearing bogus flag for %s\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
lp->ignore_sigint = 0;
}
}
static int
check_stopped_by_watchpoint (struct lwp_info *lp)
{
- if (linux_ops->to_stopped_by_watchpoint == NULL)
- return 0;
-
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
inferior_ptid = lp->ptid;
- if (linux_ops->to_stopped_by_watchpoint (linux_ops))
+ if (linux_target->low_stopped_by_watchpoint ())
{
lp->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
-
- if (linux_ops->to_stopped_data_address != NULL)
- lp->stopped_data_address_p =
- linux_ops->to_stopped_data_address (¤t_target,
- &lp->stopped_data_address);
- else
- lp->stopped_data_address_p = 0;
+ lp->stopped_data_address_p
+ = linux_target->low_stopped_data_address (&lp->stopped_data_address);
}
return lp->stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
/* Returns true if the LWP had stopped for a watchpoint. */
-static int
-linux_nat_stopped_by_watchpoint (struct target_ops *ops)
+bool
+linux_nat_target::stopped_by_watchpoint ()
{
struct lwp_info *lp = find_lwp_pid (inferior_ptid);
return lp->stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
}
-static int
-linux_nat_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
+bool
+linux_nat_target::stopped_data_address (CORE_ADDR *addr_p)
{
struct lwp_info *lp = find_lwp_pid (inferior_ptid);
/* Commonly any breakpoint / watchpoint generate only SIGTRAP. */
-static int
-sigtrap_is_event (int status)
+bool
+linux_nat_target::low_status_is_event (int status)
{
return WIFSTOPPED (status) && WSTOPSIG (status) == SIGTRAP;
}
-/* Set alternative SIGTRAP-like events recognizer. If
- breakpoint_inserted_here_p there then gdbarch_decr_pc_after_break will be
- applied. */
-
-void
-linux_nat_set_status_is_event (struct target_ops *t,
- int (*status_is_event) (int status))
-{
- linux_nat_status_is_event = status_is_event;
-}
-
/* Wait until LP is stopped. */
static int
-stop_wait_callback (struct lwp_info *lp, void *data)
+stop_wait_callback (struct lwp_info *lp)
{
struct inferior *inf = find_inferior_ptid (lp->ptid);
lp->ignore_sigint = 0;
errno = 0;
- ptrace (PTRACE_CONT, ptid_get_lwp (lp->ptid), 0, 0);
+ ptrace (PTRACE_CONT, lp->ptid.lwp (), 0, 0);
lp->stopped = 0;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"PTRACE_CONT %s, 0, 0 (%s) "
"(discarding SIGINT)\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
errno ? safe_strerror (errno) : "OK");
- return stop_wait_callback (lp, NULL);
+ return stop_wait_callback (lp);
}
maybe_clear_ignore_sigint (lp);
fprintf_unfiltered (gdb_stdlog,
"SWC: Pending event %s in %s\n",
status_to_str ((int) status),
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
/* Save the sigtrap event. */
lp->status = status;
}
else
{
- /* We caught the SIGSTOP that we intended to catch, so
- there's no SIGSTOP pending. */
+ /* We caught the SIGSTOP that we intended to catch. */
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"SWC: Expected SIGSTOP caught for %s.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
- /* Reset SIGNALLED only after the stop_wait_callback call
- above as it does gdb_assert on SIGNALLED. */
lp->signalled = 0;
+
+ /* If we are waiting for this stop so we can report the thread
+ stopped then we need to record this status. Otherwise, we can
+ now discard this stop event. */
+ if (lp->last_resume_kind == resume_stop)
+ {
+ lp->status = status;
+ save_stop_reason (lp);
+ }
}
}
caused the stop became uninteresting. */
static int
-status_callback (struct lwp_info *lp, void *data)
+status_callback (struct lwp_info *lp)
{
/* Only report a pending wait status if we pretend that this has
indeed been resumed. */
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"SC: PC of %s changed. was=%s, now=%s\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
paddress (target_gdbarch (), lp->stop_pc),
paddress (target_gdbarch (), pc));
discard = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"SC: previous breakpoint of %s, at %s gone\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
paddress (target_gdbarch (), lp->stop_pc));
discard = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"SC: pending event of %s cancelled.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
lp->status = 0;
linux_resume_one_lwp (lp, lp->step, GDB_SIGNAL_0);
/* Count the LWP's that have had events. */
static int
-count_events_callback (struct lwp_info *lp, void *data)
+count_events_callback (struct lwp_info *lp, int *count)
{
- int *count = (int *) data;
-
gdb_assert (count != NULL);
/* Select only resumed LWPs that have an event pending. */
/* Select the LWP (if any) that is currently being single-stepped. */
static int
-select_singlestep_lwp_callback (struct lwp_info *lp, void *data)
+select_singlestep_lwp_callback (struct lwp_info *lp)
{
if (lp->last_resume_kind == resume_step
&& lp->status != 0)
/* Select the Nth LWP that has had an event. */
static int
-select_event_lwp_callback (struct lwp_info *lp, void *data)
+select_event_lwp_callback (struct lwp_info *lp, int *selector)
{
- int *selector = (int *) data;
-
gdb_assert (selector != NULL);
/* Select only resumed LWPs that have an event pending. */
gdb_assert (lp->stop_reason == TARGET_STOPPED_BY_NO_REASON);
gdb_assert (lp->status != 0);
- if (!linux_nat_status_is_event (lp->status))
+ if (!linux_target->low_status_is_event (lp->status))
return;
regcache = get_thread_regcache (lp->ptid);
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"CSBB: %s stopped by trace\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
/* We may have single stepped an instruction that
triggered a watchpoint. In that case, on some
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"CSBB: %s stopped by software breakpoint\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
/* Back up the PC if necessary. */
if (pc != sw_bp_pc)
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"CSBB: %s stopped by hardware breakpoint\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else if (lp->stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"CSBB: %s stopped by hardware watchpoint\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
lp->stop_pc = pc;
/* Returns true if the LWP had stopped for a software breakpoint. */
-static int
-linux_nat_stopped_by_sw_breakpoint (struct target_ops *ops)
+bool
+linux_nat_target::stopped_by_sw_breakpoint ()
{
struct lwp_info *lp = find_lwp_pid (inferior_ptid);
/* Implement the supports_stopped_by_sw_breakpoint method. */
-static int
-linux_nat_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
+bool
+linux_nat_target::supports_stopped_by_sw_breakpoint ()
{
return USE_SIGTRAP_SIGINFO;
}
/* Returns true if the LWP had stopped for a hardware
breakpoint/watchpoint. */
-static int
-linux_nat_stopped_by_hw_breakpoint (struct target_ops *ops)
+bool
+linux_nat_target::stopped_by_hw_breakpoint ()
{
struct lwp_info *lp = find_lwp_pid (inferior_ptid);
/* Implement the supports_stopped_by_hw_breakpoint method. */
-static int
-linux_nat_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
+bool
+linux_nat_target::supports_stopped_by_hw_breakpoint ()
{
return USE_SIGTRAP_SIGINFO;
}
signal. */
if (!target_is_non_stop_p ())
{
- event_lp = iterate_over_lwps (filter,
- select_singlestep_lwp_callback, NULL);
+ event_lp = iterate_over_lwps (filter, select_singlestep_lwp_callback);
if (event_lp != NULL)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"SEL: Select single-step %s\n",
- target_pid_to_str (event_lp->ptid));
+ target_pid_to_str (event_lp->ptid).c_str ());
}
}
/* Pick one at random, out of those which have had events. */
/* First see how many events we have. */
- iterate_over_lwps (filter, count_events_callback, &num_events);
+ iterate_over_lwps (filter,
+ [&] (struct lwp_info *info)
+ {
+ return count_events_callback (info, &num_events);
+ });
gdb_assert (num_events > 0);
/* Now randomly pick a LWP out of those that have had
"SEL: Found %d events, selecting #%d\n",
num_events, random_selector);
- event_lp = iterate_over_lwps (filter,
- select_event_lwp_callback,
- &random_selector);
+ event_lp
+ = (iterate_over_lwps
+ (filter,
+ [&] (struct lwp_info *info)
+ {
+ return select_event_lwp_callback (info,
+ &random_selector);
+ }));
}
if (event_lp != NULL)
/* Return non-zero if LP has been resumed. */
static int
-resumed_callback (struct lwp_info *lp, void *data)
+resumed_callback (struct lwp_info *lp)
{
return lp->resumed;
}
struct lwp_info *lp;
int event = linux_ptrace_get_extended_event (status);
- lp = find_lwp_pid (pid_to_ptid (lwpid));
+ lp = find_lwp_pid (ptid_t (lwpid));
/* Check for stop events reported by a process we didn't already
know about - anything not already in our LWP list.
"LLW: Re-adding thread group leader LWP %d.\n",
lwpid);
- lp = add_lwp (ptid_build (lwpid, lwpid, 0));
+ lp = add_lwp (ptid_t (lwpid, lwpid, 0));
lp->stopped = 1;
lp->resumed = 1;
add_thread (lp->ptid);
if (WIFSTOPPED (status) && lp->must_set_ptrace_flags)
{
- struct inferior *inf = find_inferior_pid (ptid_get_pid (lp->ptid));
+ struct inferior *inf = find_inferior_pid (lp->ptid.pid ());
int options = linux_nat_ptrace_options (inf->attach_flag);
- linux_enable_event_reporting (ptid_get_lwp (lp->ptid), options);
+ linux_enable_event_reporting (lp->ptid.lwp (), options);
lp->must_set_ptrace_flags = 0;
}
if (WIFEXITED (status) || WIFSIGNALED (status))
{
if (!report_thread_events
- && num_lwps (ptid_get_pid (lp->ptid)) > 1)
+ && num_lwps (lp->ptid.pid ()) > 1)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLW: %s exited.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
/* If there is at least one more LWP, then the exit signal
was not the end of the debugged application and should be
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LWP %ld exited (resumed=%d)\n",
- ptid_get_lwp (lp->ptid), lp->resumed);
+ lp->ptid.lwp (), lp->resumed);
/* Dead LWP's aren't expected to reported a pending sigstop. */
lp->signalled = 0;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLW: resume_stop SIGSTOP caught for %s.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else
{
"LLW: %s %s, 0, 0 (discard delayed SIGSTOP)\n",
lp->step ?
"PTRACE_SINGLESTEP" : "PTRACE_CONT",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
linux_resume_one_lwp (lp, lp->step, GDB_SIGNAL_0);
gdb_assert (lp->resumed);
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLW: Delayed SIGINT caught for %s.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
/* This is a delayed SIGINT. */
lp->ignore_sigint = 0;
"LLW: %s %s, 0, 0 (discard SIGINT)\n",
lp->step ?
"PTRACE_SINGLESTEP" : "PTRACE_CONT",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
gdb_assert (lp->resumed);
/* Discard the event. */
will receive it - unless they're using CLONE_THREAD to
share signals. Since we only want to report it once, we
mark it as ignored for all LWPs except this one. */
- iterate_over_lwps (pid_to_ptid (ptid_get_pid (lp->ptid)),
- set_ignore_sigint, NULL);
+ iterate_over_lwps (ptid_t (lp->ptid.pid ()), set_ignore_sigint);
lp->ignore_sigint = 0;
}
else
/* When using hardware single-step, we need to report every signal.
Otherwise, signals in pass_mask may be short-circuited
- except signals that might be caused by a breakpoint. */
+ except signals that might be caused by a breakpoint, or SIGSTOP
+ if we sent the SIGSTOP and are waiting for it to arrive. */
if (!lp->step
&& WSTOPSIG (status) && sigismember (&pass_mask, WSTOPSIG (status))
+ && (WSTOPSIG (status) != SIGSTOP
+ || !find_thread_ptid (lp->ptid)->stop_requested)
&& !linux_wstatus_maybe_breakpoint (status))
{
linux_resume_one_lwp (lp, lp->step, signo);
"LLW: %s %s, %s (preempt 'handle')\n",
lp->step ?
"PTRACE_SINGLESTEP" : "PTRACE_CONT",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
(signo != GDB_SIGNAL_0
? strsignal (gdb_signal_to_host (signo))
: "0"));
static void
check_zombie_leaders (void)
{
- struct inferior *inf;
-
- ALL_INFERIORS (inf)
+ for (inferior *inf : all_inferiors ())
{
struct lwp_info *leader_lp;
if (inf->pid == 0)
continue;
- leader_lp = find_lwp_pid (pid_to_ptid (inf->pid));
+ leader_lp = find_lwp_pid (ptid_t (inf->pid));
if (leader_lp != NULL
/* Check if there are other threads in the group, as we may
have raced with the inferior simply exiting. */
{
ptid_t ptid = event_child->ptid;
- if (num_lwps (ptid_get_pid (ptid)) > 1)
+ if (num_lwps (ptid.pid ()) > 1)
{
if (report_thread_events)
ourstatus->kind = TARGET_WAITKIND_THREAD_EXITED;
}
static ptid_t
-linux_nat_wait_1 (struct target_ops *ops,
- ptid_t ptid, struct target_waitstatus *ourstatus,
+linux_nat_wait_1 (ptid_t ptid, struct target_waitstatus *ourstatus,
int target_options)
{
sigset_t prev_mask;
/* The first time we get here after starting a new inferior, we may
not have added it to the LWP list yet - this is the earliest
moment at which we know its PID. */
- if (ptid_is_pid (inferior_ptid))
+ if (inferior_ptid.is_pid ())
{
/* Upgrade the main thread's ptid. */
thread_change_ptid (inferior_ptid,
- ptid_build (ptid_get_pid (inferior_ptid),
- ptid_get_pid (inferior_ptid), 0));
+ ptid_t (inferior_ptid.pid (),
+ inferior_ptid.pid (), 0));
lp = add_initial_lwp (inferior_ptid);
lp->resumed = 1;
block_child_signals (&prev_mask);
/* First check if there is a LWP with a wait status pending. */
- lp = iterate_over_lwps (ptid, status_callback, NULL);
+ lp = iterate_over_lwps (ptid, status_callback);
if (lp != NULL)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLW: Using pending wait status %s for %s.\n",
status_to_str (lp->status),
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
/* But if we don't find a pending event, we'll have to wait. Always
- If the thread group leader exits while other threads in the
thread group still exist, waitpid(TGID, ...) hangs. That
waitpid won't return an exit status until the other threads
- in the group are reapped.
+ in the group are reaped.
- When a non-leader thread execs, that thread just vanishes
without reporting an exit (so we'd hang if we waited for it
/* Now that we've pulled all events out of the kernel, resume
LWPs that don't have an interesting event to report. */
iterate_over_lwps (minus_one_ptid,
- resume_stopped_resumed_lwps, &minus_one_ptid);
+ [] (struct lwp_info *info)
+ {
+ return resume_stopped_resumed_lwps (info, minus_one_ptid);
+ });
/* ... and find an LWP with a status to report to the core, if
any. */
- lp = iterate_over_lwps (ptid, status_callback, NULL);
+ lp = iterate_over_lwps (ptid, status_callback);
if (lp != NULL)
break;
/* If there are no resumed children left, bail. We'd be stuck
forever in the sigsuspend call below otherwise. */
- if (iterate_over_lwps (ptid, resumed_callback, NULL) == NULL)
+ if (iterate_over_lwps (ptid, resumed_callback) == NULL)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog, "LLW: exit (no resumed LWP)\n");
if (!target_is_non_stop_p ())
{
/* Now stop all other LWP's ... */
- iterate_over_lwps (minus_one_ptid, stop_callback, NULL);
+ iterate_over_lwps (minus_one_ptid, stop_callback);
/* ... and wait until all of them have reported back that
they're no longer running. */
- iterate_over_lwps (minus_one_ptid, stop_wait_callback, NULL);
+ iterate_over_lwps (minus_one_ptid, stop_wait_callback);
}
/* If we're not waiting for a specific LWP, choose an event LWP from
among those that have had events. Giving equal priority to all
LWPs that have had events helps prevent starvation. */
- if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
+ if (ptid == minus_one_ptid || ptid.is_pid ())
select_event_lwp (ptid, &lp, &status);
gdb_assert (lp != NULL);
{
/* In all-stop, from the core's perspective, all LWPs are now
stopped until a new resume action is sent over. */
- iterate_over_lwps (minus_one_ptid, resume_clear_callback, NULL);
+ iterate_over_lwps (minus_one_ptid, resume_clear_callback);
}
else
{
- resume_clear_callback (lp, NULL);
+ resume_clear_callback (lp);
}
- if (linux_nat_status_is_event (status))
+ if (linux_target->low_status_is_event (status))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLW: trap ptid is %s.\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
if (lp->waitstatus.kind != TARGET_WAITKIND_IGNORE)
to report, but are resumed from the core's perspective. */
static int
-resume_stopped_resumed_lwps (struct lwp_info *lp, void *data)
+resume_stopped_resumed_lwps (struct lwp_info *lp, const ptid_t wait_ptid)
{
- ptid_t *wait_ptid_p = (ptid_t *) data;
-
if (!lp->stopped)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RSRL: NOT resuming LWP %s, not stopped\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else if (!lp->resumed)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RSRL: NOT resuming LWP %s, not resumed\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else if (lwp_status_pending_p (lp))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"RSRL: NOT resuming LWP %s, has pending status\n",
- target_pid_to_str (lp->ptid));
+ target_pid_to_str (lp->ptid).c_str ());
}
else
{
struct regcache *regcache = get_thread_regcache (lp->ptid);
struct gdbarch *gdbarch = regcache->arch ();
- TRY
+ try
{
CORE_ADDR pc = regcache_read_pc (regcache);
int leave_stopped = 0;
/* Don't bother if there's a breakpoint at PC that we'd hit
immediately, and we're not waiting for this LWP. */
- if (!ptid_match (lp->ptid, *wait_ptid_p))
+ if (!lp->ptid.matches (wait_ptid))
{
if (breakpoint_inserted_here_p (regcache->aspace (), pc))
leave_stopped = 1;
fprintf_unfiltered (gdb_stdlog,
"RSRL: resuming stopped-resumed LWP %s at "
"%s: step=%d\n",
- target_pid_to_str (lp->ptid),
+ target_pid_to_str (lp->ptid).c_str (),
paddress (gdbarch, pc),
lp->step);
linux_resume_one_lwp_throw (lp, lp->step, GDB_SIGNAL_0);
}
}
- CATCH (ex, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &ex)
{
if (!check_ptrace_stopped_lwp_gone (lp))
- throw_exception (ex);
+ throw;
}
- END_CATCH
}
return 0;
}
-static ptid_t
-linux_nat_wait (struct target_ops *ops,
- ptid_t ptid, struct target_waitstatus *ourstatus,
- int target_options)
+ptid_t
+linux_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
+ int target_options)
{
ptid_t event_ptid;
if (debug_linux_nat)
{
- char *options_string;
-
- options_string = target_options_to_string (target_options);
+ std::string options_string = target_options_to_string (target_options);
fprintf_unfiltered (gdb_stdlog,
"linux_nat_wait: [%s], [%s]\n",
- target_pid_to_str (ptid),
- options_string);
- xfree (options_string);
+ target_pid_to_str (ptid).c_str (),
+ options_string.c_str ());
}
/* Flush the async file first. */
meanwhile the event became uninteresting. Don't bother resuming
LWPs we're not going to wait for if they'd stop immediately. */
if (target_is_non_stop_p ())
- iterate_over_lwps (minus_one_ptid, resume_stopped_resumed_lwps, &ptid);
+ iterate_over_lwps (minus_one_ptid,
+ [=] (struct lwp_info *info)
+ {
+ return resume_stopped_resumed_lwps (info, ptid);
+ });
- event_ptid = linux_nat_wait_1 (ops, ptid, ourstatus, target_options);
+ event_ptid = linux_nat_wait_1 (ptid, ourstatus, target_options);
/* If we requested any event, and something came out, assume there
may be more. If we requested a specific lwp or process, also
if (target_is_async_p ()
&& ((ourstatus->kind != TARGET_WAITKIND_IGNORE
&& ourstatus->kind != TARGET_WAITKIND_NO_RESUMED)
- || !ptid_equal (ptid, minus_one_ptid)))
+ || ptid != minus_one_ptid))
async_file_mark ();
return event_ptid;
/* Callback for iterate_over_lwps. */
static int
-kill_callback (struct lwp_info *lp, void *data)
+kill_callback (struct lwp_info *lp)
{
- kill_one_lwp (ptid_get_lwp (lp->ptid));
+ kill_one_lwp (lp->ptid.lwp ());
return 0;
}
/* Callback for iterate_over_lwps. */
static int
-kill_wait_callback (struct lwp_info *lp, void *data)
+kill_wait_callback (struct lwp_info *lp)
{
- kill_wait_one_lwp (ptid_get_lwp (lp->ptid));
+ kill_wait_one_lwp (lp->ptid.lwp ());
return 0;
}
static void
kill_unfollowed_fork_children (struct inferior *inf)
{
- struct thread_info *thread;
+ for (thread_info *thread : inf->non_exited_threads ())
+ {
+ struct target_waitstatus *ws = &thread->pending_follow;
- ALL_NON_EXITED_THREADS (thread)
- if (thread->inf == inf)
- {
- struct target_waitstatus *ws = &thread->pending_follow;
-
- if (ws->kind == TARGET_WAITKIND_FORKED
- || ws->kind == TARGET_WAITKIND_VFORKED)
- {
- ptid_t child_ptid = ws->value.related_pid;
- int child_pid = ptid_get_pid (child_ptid);
- int child_lwp = ptid_get_lwp (child_ptid);
-
- kill_one_lwp (child_lwp);
- kill_wait_one_lwp (child_lwp);
-
- /* Let the arch-specific native code know this process is
- gone. */
- linux_nat_forget_process (child_pid);
- }
- }
+ if (ws->kind == TARGET_WAITKIND_FORKED
+ || ws->kind == TARGET_WAITKIND_VFORKED)
+ {
+ ptid_t child_ptid = ws->value.related_pid;
+ int child_pid = child_ptid.pid ();
+ int child_lwp = child_ptid.lwp ();
+
+ kill_one_lwp (child_lwp);
+ kill_wait_one_lwp (child_lwp);
+
+ /* Let the arch-specific native code know this process is
+ gone. */
+ linux_target->low_forget_process (child_pid);
+ }
+ }
}
-static void
-linux_nat_kill (struct target_ops *ops)
+void
+linux_nat_target::kill ()
{
/* If we're stopped while forking and we haven't followed yet,
kill the other task. We need to do this first because the
linux_fork_killall ();
else
{
- ptid_t ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
+ ptid_t ptid = ptid_t (inferior_ptid.pid ());
/* Stop all threads before killing them, since ptrace requires
- that the thread is stopped to sucessfully PTRACE_KILL. */
- iterate_over_lwps (ptid, stop_callback, NULL);
+ that the thread is stopped to successfully PTRACE_KILL. */
+ iterate_over_lwps (ptid, stop_callback);
/* ... and wait until all of them have reported back that
they're no longer running. */
- iterate_over_lwps (ptid, stop_wait_callback, NULL);
+ iterate_over_lwps (ptid, stop_wait_callback);
/* Kill all LWP's ... */
- iterate_over_lwps (ptid, kill_callback, NULL);
+ iterate_over_lwps (ptid, kill_callback);
/* ... and wait until we've flushed all events. */
- iterate_over_lwps (ptid, kill_wait_callback, NULL);
+ iterate_over_lwps (ptid, kill_wait_callback);
}
target_mourn_inferior (inferior_ptid);
}
-static void
-linux_nat_mourn_inferior (struct target_ops *ops)
+void
+linux_nat_target::mourn_inferior ()
{
- int pid = ptid_get_pid (inferior_ptid);
+ int pid = inferior_ptid.pid ();
purge_lwp_list (pid);
if (! forks_exist_p ())
/* Normal case, no other forks available. */
- linux_ops->to_mourn_inferior (ops);
+ inf_ptrace_target::mourn_inferior ();
else
/* Multi-fork case. The current inferior_ptid has exited, but
there are other viable forks to debug. Delete the exiting
linux_fork_mourn_inferior ();
/* Let the arch-specific native code know this process is gone. */
- linux_nat_forget_process (pid);
+ linux_target->low_forget_process (pid);
}
/* Convert a native/host siginfo object, into/from the siginfo in the
static void
siginfo_fixup (siginfo_t *siginfo, gdb_byte *inf_siginfo, int direction)
{
- int done = 0;
-
- if (linux_nat_siginfo_fixup != NULL)
- done = linux_nat_siginfo_fixup (siginfo, inf_siginfo, direction);
-
- /* If there was no callback, or the callback didn't do anything,
- then just do a straight memcpy. */
- if (!done)
+ /* If the low target didn't do anything, then just do a straight
+ memcpy. */
+ if (!linux_target->low_siginfo_fixup (siginfo, inf_siginfo, direction))
{
if (direction == 1)
memcpy (siginfo, inf_siginfo, sizeof (siginfo_t));
}
static enum target_xfer_status
-linux_xfer_siginfo (struct target_ops *ops, enum target_object object,
+linux_xfer_siginfo (enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
ULONGEST *xfered_len)
gdb_assert (object == TARGET_OBJECT_SIGNAL_INFO);
gdb_assert (readbuf || writebuf);
- pid = ptid_get_lwp (inferior_ptid);
+ pid = inferior_ptid.lwp ();
if (pid == 0)
- pid = ptid_get_pid (inferior_ptid);
+ pid = inferior_ptid.pid ();
if (offset > sizeof (siginfo))
return TARGET_XFER_E_IO;
}
static enum target_xfer_status
-linux_nat_xfer_partial (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
+linux_nat_xfer_osdata (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len);
+
+static enum target_xfer_status
+linux_proc_xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len, ULONGEST *xfered_len);
+
+enum target_xfer_status
+linux_nat_target::xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
enum target_xfer_status xfer;
if (object == TARGET_OBJECT_SIGNAL_INFO)
- return linux_xfer_siginfo (ops, object, annex, readbuf, writebuf,
+ return linux_xfer_siginfo (object, annex, readbuf, writebuf,
offset, len, xfered_len);
/* The target is connected but no live inferior is selected. Pass
this request down to a lower stratum (e.g., the executable
file). */
- if (object == TARGET_OBJECT_MEMORY && ptid_equal (inferior_ptid, null_ptid))
+ if (object == TARGET_OBJECT_MEMORY && inferior_ptid == null_ptid)
return TARGET_XFER_EOF;
- xfer = linux_ops->to_xfer_partial (ops, object, annex, readbuf, writebuf,
- offset, len, xfered_len);
+ if (object == TARGET_OBJECT_AUXV)
+ return memory_xfer_auxv (this, object, annex, readbuf, writebuf,
+ offset, len, xfered_len);
+
+ if (object == TARGET_OBJECT_OSDATA)
+ return linux_nat_xfer_osdata (object, annex, readbuf, writebuf,
+ offset, len, xfered_len);
+
+ /* GDB calculates all addresses in the largest possible address
+ width.
+ The address width must be masked before its final use - either by
+ linux_proc_xfer_partial or inf_ptrace_target::xfer_partial.
+
+ Compare ADDR_BIT first to avoid a compiler warning on shift overflow. */
+
+ if (object == TARGET_OBJECT_MEMORY)
+ {
+ int addr_bit = gdbarch_addr_bit (target_gdbarch ());
+
+ if (addr_bit < (sizeof (ULONGEST) * HOST_CHAR_BIT))
+ offset &= ((ULONGEST) 1 << addr_bit) - 1;
+ }
+
+ xfer = linux_proc_xfer_partial (object, annex, readbuf, writebuf,
+ offset, len, xfered_len);
+ if (xfer != TARGET_XFER_EOF)
+ return xfer;
- return xfer;
+ return inf_ptrace_target::xfer_partial (object, annex, readbuf, writebuf,
+ offset, len, xfered_len);
}
-static int
-linux_nat_thread_alive (struct target_ops *ops, ptid_t ptid)
+bool
+linux_nat_target::thread_alive (ptid_t ptid)
{
/* As long as a PTID is in lwp list, consider it alive. */
return find_lwp_pid (ptid) != NULL;
/* Implement the to_update_thread_list target method for this
target. */
-static void
-linux_nat_update_thread_list (struct target_ops *ops)
+void
+linux_nat_target::update_thread_list ()
{
struct lwp_info *lwp;
}
}
-static const char *
-linux_nat_pid_to_str (struct target_ops *ops, ptid_t ptid)
+std::string
+linux_nat_target::pid_to_str (ptid_t ptid)
{
- static char buf[64];
-
- if (ptid_lwp_p (ptid)
- && (ptid_get_pid (ptid) != ptid_get_lwp (ptid)
- || num_lwps (ptid_get_pid (ptid)) > 1))
- {
- snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid));
- return buf;
- }
+ if (ptid.lwp_p ()
+ && (ptid.pid () != ptid.lwp ()
+ || num_lwps (ptid.pid ()) > 1))
+ return string_printf ("LWP %ld", ptid.lwp ());
return normal_pid_to_str (ptid);
}
-static const char *
-linux_nat_thread_name (struct target_ops *self, struct thread_info *thr)
+const char *
+linux_nat_target::thread_name (struct thread_info *thr)
{
return linux_proc_tid_get_name (thr->ptid);
}
/* Accepts an integer PID; Returns a string representing a file that
can be opened to get the symbols for the child process. */
-static char *
-linux_child_pid_to_exec_file (struct target_ops *self, int pid)
+char *
+linux_nat_target::pid_to_exec_file (int pid)
{
return linux_proc_pid_to_exec_file (pid);
}
efficient than banging away at PTRACE_PEEKTEXT. */
static enum target_xfer_status
-linux_proc_xfer_partial (struct target_ops *ops, enum target_object object,
+linux_proc_xfer_partial (enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
/* We could keep this file open and cache it - possibly one per
thread. That requires some juggling, but is even faster. */
xsnprintf (filename, sizeof filename, "/proc/%ld/mem",
- ptid_get_lwp (inferior_ptid));
+ inferior_ptid.lwp ());
fd = gdb_open_cloexec (filename, ((readbuf ? O_RDONLY : O_WRONLY)
| O_LARGEFILE), 0);
if (fd == -1)
}
-/* Enumerate spufs IDs for process PID. */
-static LONGEST
-spu_enumerate_spu_ids (int pid, gdb_byte *buf, ULONGEST offset, ULONGEST len)
-{
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
- LONGEST pos = 0;
- LONGEST written = 0;
- char path[128];
- DIR *dir;
- struct dirent *entry;
-
- xsnprintf (path, sizeof path, "/proc/%d/fd", pid);
- dir = opendir (path);
- if (!dir)
- return -1;
-
- rewinddir (dir);
- while ((entry = readdir (dir)) != NULL)
- {
- struct stat st;
- struct statfs stfs;
- int fd;
-
- fd = atoi (entry->d_name);
- if (!fd)
- continue;
-
- xsnprintf (path, sizeof path, "/proc/%d/fd/%d", pid, fd);
- if (stat (path, &st) != 0)
- continue;
- if (!S_ISDIR (st.st_mode))
- continue;
-
- if (statfs (path, &stfs) != 0)
- continue;
- if (stfs.f_type != SPUFS_MAGIC)
- continue;
-
- if (pos >= offset && pos + 4 <= offset + len)
- {
- store_unsigned_integer (buf + pos - offset, 4, byte_order, fd);
- written += 4;
- }
- pos += 4;
- }
-
- closedir (dir);
- return written;
-}
-
-/* Implement the to_xfer_partial interface for the TARGET_OBJECT_SPU
- object type, using the /proc file system. */
-
-static enum target_xfer_status
-linux_proc_xfer_spu (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
-{
- char buf[128];
- int fd = 0;
- int ret = -1;
- int pid = ptid_get_lwp (inferior_ptid);
-
- if (!annex)
- {
- if (!readbuf)
- return TARGET_XFER_E_IO;
- else
- {
- LONGEST l = spu_enumerate_spu_ids (pid, readbuf, offset, len);
-
- if (l < 0)
- return TARGET_XFER_E_IO;
- else if (l == 0)
- return TARGET_XFER_EOF;
- else
- {
- *xfered_len = (ULONGEST) l;
- return TARGET_XFER_OK;
- }
- }
- }
-
- xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex);
- fd = gdb_open_cloexec (buf, writebuf? O_WRONLY : O_RDONLY, 0);
- if (fd <= 0)
- return TARGET_XFER_E_IO;
-
- if (offset != 0
- && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
- {
- close (fd);
- return TARGET_XFER_EOF;
- }
-
- if (writebuf)
- ret = write (fd, writebuf, (size_t) len);
- else if (readbuf)
- ret = read (fd, readbuf, (size_t) len);
-
- close (fd);
-
- if (ret < 0)
- return TARGET_XFER_E_IO;
- else if (ret == 0)
- return TARGET_XFER_EOF;
- else
- {
- *xfered_len = (ULONGEST) ret;
- return TARGET_XFER_OK;
- }
-}
-
-
/* Parse LINE as a signal set and add its set bits to SIGS. */
static void
}
static enum target_xfer_status
-linux_nat_xfer_osdata (struct target_ops *ops, enum target_object object,
+linux_nat_xfer_osdata (enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
ULONGEST *xfered_len)
return TARGET_XFER_OK;
}
-static enum target_xfer_status
-linux_xfer_partial (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
- ULONGEST *xfered_len)
-{
- enum target_xfer_status xfer;
-
- if (object == TARGET_OBJECT_AUXV)
- return memory_xfer_auxv (ops, object, annex, readbuf, writebuf,
- offset, len, xfered_len);
-
- if (object == TARGET_OBJECT_OSDATA)
- return linux_nat_xfer_osdata (ops, object, annex, readbuf, writebuf,
- offset, len, xfered_len);
-
- if (object == TARGET_OBJECT_SPU)
- return linux_proc_xfer_spu (ops, object, annex, readbuf, writebuf,
- offset, len, xfered_len);
-
- /* GDB calculates all the addresses in possibly larget width of the address.
- Address width needs to be masked before its final use - either by
- linux_proc_xfer_partial or inf_ptrace_xfer_partial.
-
- Compare ADDR_BIT first to avoid a compiler warning on shift overflow. */
-
- if (object == TARGET_OBJECT_MEMORY)
- {
- int addr_bit = gdbarch_addr_bit (target_gdbarch ());
-
- if (addr_bit < (sizeof (ULONGEST) * HOST_CHAR_BIT))
- offset &= ((ULONGEST) 1 << addr_bit) - 1;
- }
-
- xfer = linux_proc_xfer_partial (ops, object, annex, readbuf, writebuf,
- offset, len, xfered_len);
- if (xfer != TARGET_XFER_EOF)
- return xfer;
-
- return super_xfer_partial (ops, object, annex, readbuf, writebuf,
- offset, len, xfered_len);
-}
-
-static void
-cleanup_target_stop (void *arg)
-{
- ptid_t *ptid = (ptid_t *) arg;
-
- gdb_assert (arg != NULL);
-
- /* Unpause all */
- target_continue_no_signal (*ptid);
-}
-
-static std::vector<static_tracepoint_marker>
-linux_child_static_tracepoint_markers_by_strid (struct target_ops *self,
- const char *strid)
+std::vector<static_tracepoint_marker>
+linux_nat_target::static_tracepoint_markers_by_strid (const char *strid)
{
char s[IPA_CMD_BUF_SIZE];
- struct cleanup *old_chain;
- int pid = ptid_get_pid (inferior_ptid);
+ int pid = inferior_ptid.pid ();
std::vector<static_tracepoint_marker> markers;
const char *p = s;
- ptid_t ptid = ptid_build (pid, 0, 0);
+ ptid_t ptid = ptid_t (pid, 0, 0);
static_tracepoint_marker marker;
/* Pause all */
agent_run_command (pid, s, strlen (s) + 1);
- old_chain = make_cleanup (cleanup_target_stop, &ptid);
+ /* Unpause all. */
+ SCOPE_EXIT { target_continue_no_signal (ptid); };
while (*p++ == 'm')
{
p = s;
}
- do_cleanups (old_chain);
-
return markers;
}
-/* Create a prototype generic GNU/Linux target. The client can override
- it with local methods. */
-
-void
-linux_target_install_ops (struct target_ops *t)
-{
- t->to_insert_fork_catchpoint = linux_child_insert_fork_catchpoint;
- t->to_remove_fork_catchpoint = linux_child_remove_fork_catchpoint;
- t->to_insert_vfork_catchpoint = linux_child_insert_vfork_catchpoint;
- t->to_remove_vfork_catchpoint = linux_child_remove_vfork_catchpoint;
- t->to_insert_exec_catchpoint = linux_child_insert_exec_catchpoint;
- t->to_remove_exec_catchpoint = linux_child_remove_exec_catchpoint;
- t->to_set_syscall_catchpoint = linux_child_set_syscall_catchpoint;
- t->to_pid_to_exec_file = linux_child_pid_to_exec_file;
- t->to_post_startup_inferior = linux_child_post_startup_inferior;
- t->to_post_attach = linux_child_post_attach;
- t->to_follow_fork = linux_child_follow_fork;
-
- super_xfer_partial = t->to_xfer_partial;
- t->to_xfer_partial = linux_xfer_partial;
-
- t->to_static_tracepoint_markers_by_strid
- = linux_child_static_tracepoint_markers_by_strid;
-}
-
-struct target_ops *
-linux_target (void)
-{
- struct target_ops *t;
-
- t = inf_ptrace_target ();
- linux_target_install_ops (t);
-
- return t;
-}
-
/* target_is_async_p implementation. */
-static int
-linux_nat_is_async_p (struct target_ops *ops)
+bool
+linux_nat_target::is_async_p ()
{
return linux_is_async_p ();
}
/* target_can_async_p implementation. */
-static int
-linux_nat_can_async_p (struct target_ops *ops)
+bool
+linux_nat_target::can_async_p ()
{
/* We're always async, unless the user explicitly prevented it with the
"maint set target-async" command. */
return target_async_permitted;
}
-static int
-linux_nat_supports_non_stop (struct target_ops *self)
+bool
+linux_nat_target::supports_non_stop ()
{
return 1;
}
/* to_always_non_stop_p implementation. */
-static int
-linux_nat_always_non_stop_p (struct target_ops *self)
+bool
+linux_nat_target::always_non_stop_p ()
{
return 1;
}
int linux_multi_process = 1;
-static int
-linux_nat_supports_multi_process (struct target_ops *self)
+bool
+linux_nat_target::supports_multi_process ()
{
return linux_multi_process;
}
-static int
-linux_nat_supports_disable_randomization (struct target_ops *self)
+bool
+linux_nat_target::supports_disable_randomization ()
{
#ifdef HAVE_PERSONALITY
return 1;
/* target_async implementation. */
-static void
-linux_nat_async (struct target_ops *ops, int enable)
+void
+linux_nat_target::async (int enable)
{
if (enable)
{
event came out. */
static int
-linux_nat_stop_lwp (struct lwp_info *lwp, void *data)
+linux_nat_stop_lwp (struct lwp_info *lwp)
{
if (!lwp->stopped)
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LNSL: running -> suspending %s\n",
- target_pid_to_str (lwp->ptid));
+ target_pid_to_str (lwp->ptid).c_str ());
if (lwp->last_resume_kind == resume_stop)
fprintf_unfiltered (gdb_stdlog,
"linux-nat: already stopping LWP %ld at "
"GDB's request\n",
- ptid_get_lwp (lwp->ptid));
+ lwp->ptid.lwp ());
return 0;
}
- stop_callback (lwp, NULL);
+ stop_callback (lwp);
lwp->last_resume_kind = resume_stop;
}
else
if (find_thread_ptid (lwp->ptid)->stop_requested)
fprintf_unfiltered (gdb_stdlog,
"LNSL: already stopped/stop_requested %s\n",
- target_pid_to_str (lwp->ptid));
+ target_pid_to_str (lwp->ptid).c_str ());
else
fprintf_unfiltered (gdb_stdlog,
"LNSL: already stopped/no "
"stop_requested yet %s\n",
- target_pid_to_str (lwp->ptid));
+ target_pid_to_str (lwp->ptid).c_str ());
}
}
return 0;
}
-static void
-linux_nat_stop (struct target_ops *self, ptid_t ptid)
+void
+linux_nat_target::stop (ptid_t ptid)
{
- iterate_over_lwps (ptid, linux_nat_stop_lwp, NULL);
+ iterate_over_lwps (ptid, linux_nat_stop_lwp);
}
-static void
-linux_nat_close (struct target_ops *self)
+void
+linux_nat_target::close ()
{
/* Unregister from the event loop. */
- if (linux_nat_is_async_p (self))
- linux_nat_async (self, 0);
+ if (is_async_p ())
+ async (0);
- if (linux_ops->to_close)
- linux_ops->to_close (linux_ops);
-
- super_close (self);
+ inf_ptrace_target::close ();
}
/* When requests are passed down from the linux-nat layer to the
lwpid is a "main" process id or not (it assumes so). We reverse
look up the "main" process id from the lwp here. */
-static struct address_space *
-linux_nat_thread_address_space (struct target_ops *t, ptid_t ptid)
+struct address_space *
+linux_nat_target::thread_address_space (ptid_t ptid)
{
struct lwp_info *lwp;
struct inferior *inf;
int pid;
- if (ptid_get_lwp (ptid) == 0)
+ if (ptid.lwp () == 0)
{
/* An (lwpid,0,0) ptid. Look up the lwp object to get at the
tgid. */
lwp = find_lwp_pid (ptid);
- pid = ptid_get_pid (lwp->ptid);
+ pid = lwp->ptid.pid ();
}
else
{
/* A (pid,lwpid,0) ptid. */
- pid = ptid_get_pid (ptid);
+ pid = ptid.pid ();
}
inf = find_inferior_pid (pid);
/* Return the cached value of the processor core for thread PTID. */
-static int
-linux_nat_core_of_thread (struct target_ops *ops, ptid_t ptid)
+int
+linux_nat_target::core_of_thread (ptid_t ptid)
{
struct lwp_info *info = find_lwp_pid (ptid);
/* Implementation of to_filesystem_is_local. */
-static int
-linux_nat_filesystem_is_local (struct target_ops *ops)
+bool
+linux_nat_target::filesystem_is_local ()
{
struct inferior *inf = current_inferior ();
if (inf->fake_pid_p || inf->pid == 0)
- return 1;
+ return true;
return linux_ns_same (inf->pid, LINUX_NS_MNT);
}
/* Implementation of to_fileio_open. */
-static int
-linux_nat_fileio_open (struct target_ops *self,
- struct inferior *inf, const char *filename,
- int flags, int mode, int warn_if_slow,
- int *target_errno)
+int
+linux_nat_target::fileio_open (struct inferior *inf, const char *filename,
+ int flags, int mode, int warn_if_slow,
+ int *target_errno)
{
int nat_flags;
mode_t nat_mode;
/* Implementation of to_fileio_readlink. */
-static gdb::optional<std::string>
-linux_nat_fileio_readlink (struct target_ops *self,
- struct inferior *inf, const char *filename,
- int *target_errno)
+gdb::optional<std::string>
+linux_nat_target::fileio_readlink (struct inferior *inf, const char *filename,
+ int *target_errno)
{
char buf[PATH_MAX];
int len;
/* Implementation of to_fileio_unlink. */
-static int
-linux_nat_fileio_unlink (struct target_ops *self,
- struct inferior *inf, const char *filename,
- int *target_errno)
+int
+linux_nat_target::fileio_unlink (struct inferior *inf, const char *filename,
+ int *target_errno)
{
int ret;
/* Implementation of the to_thread_events method. */
-static void
-linux_nat_thread_events (struct target_ops *ops, int enable)
+void
+linux_nat_target::thread_events (int enable)
{
report_thread_events = enable;
}
-void
-linux_nat_add_target (struct target_ops *t)
-{
- /* Save the provided single-threaded target. We save this in a separate
- variable because another target we've inherited from (e.g. inf-ptrace)
- may have saved a pointer to T; we want to use it for the final
- process stratum target. */
- linux_ops_saved = *t;
- linux_ops = &linux_ops_saved;
-
- /* Override some methods for multithreading. */
- t->to_create_inferior = linux_nat_create_inferior;
- t->to_attach = linux_nat_attach;
- t->to_detach = linux_nat_detach;
- t->to_resume = linux_nat_resume;
- t->to_wait = linux_nat_wait;
- t->to_pass_signals = linux_nat_pass_signals;
- t->to_xfer_partial = linux_nat_xfer_partial;
- t->to_kill = linux_nat_kill;
- t->to_mourn_inferior = linux_nat_mourn_inferior;
- t->to_thread_alive = linux_nat_thread_alive;
- t->to_update_thread_list = linux_nat_update_thread_list;
- t->to_pid_to_str = linux_nat_pid_to_str;
- t->to_thread_name = linux_nat_thread_name;
- t->to_has_thread_control = tc_schedlock;
- t->to_thread_address_space = linux_nat_thread_address_space;
- t->to_stopped_by_watchpoint = linux_nat_stopped_by_watchpoint;
- t->to_stopped_data_address = linux_nat_stopped_data_address;
- t->to_stopped_by_sw_breakpoint = linux_nat_stopped_by_sw_breakpoint;
- t->to_supports_stopped_by_sw_breakpoint = linux_nat_supports_stopped_by_sw_breakpoint;
- t->to_stopped_by_hw_breakpoint = linux_nat_stopped_by_hw_breakpoint;
- t->to_supports_stopped_by_hw_breakpoint = linux_nat_supports_stopped_by_hw_breakpoint;
- t->to_thread_events = linux_nat_thread_events;
-
- t->to_can_async_p = linux_nat_can_async_p;
- t->to_is_async_p = linux_nat_is_async_p;
- t->to_supports_non_stop = linux_nat_supports_non_stop;
- t->to_always_non_stop_p = linux_nat_always_non_stop_p;
- t->to_async = linux_nat_async;
-
- super_close = t->to_close;
- t->to_close = linux_nat_close;
-
- t->to_stop = linux_nat_stop;
-
- t->to_supports_multi_process = linux_nat_supports_multi_process;
-
- t->to_supports_disable_randomization
- = linux_nat_supports_disable_randomization;
-
- t->to_core_of_thread = linux_nat_core_of_thread;
-
- t->to_filesystem_is_local = linux_nat_filesystem_is_local;
- t->to_fileio_open = linux_nat_fileio_open;
- t->to_fileio_readlink = linux_nat_fileio_readlink;
- t->to_fileio_unlink = linux_nat_fileio_unlink;
-
+linux_nat_target::linux_nat_target ()
+{
/* We don't change the stratum; this target will sit at
process_stratum and thread_db will set at thread_stratum. This
is a little strange, since this is a multi-threaded-capable
target, but we want to be on the stack below thread_db, and we
also want to be used for single-threaded processes. */
-
- add_target (t);
-}
-
-/* Register a method to call whenever a new thread is attached. */
-void
-linux_nat_set_new_thread (struct target_ops *t,
- void (*new_thread) (struct lwp_info *))
-{
- /* Save the pointer. We only support a single registered instance
- of the GNU/Linux native target, so we do not need to map this to
- T. */
- linux_nat_new_thread = new_thread;
-}
-
-/* Register a method to call whenever a new thread is attached. */
-void
-linux_nat_set_delete_thread (struct target_ops *t,
- void (*delete_thread) (struct arch_lwp_info *))
-{
- /* Save the pointer. We only support a single registered instance
- of the GNU/Linux native target, so we do not need to map this to
- T. */
- linux_nat_delete_thread = delete_thread;
-}
-
-/* See declaration in linux-nat.h. */
-
-void
-linux_nat_set_new_fork (struct target_ops *t,
- linux_nat_new_fork_ftype *new_fork)
-{
- /* Save the pointer. */
- linux_nat_new_fork = new_fork;
-}
-
-/* See declaration in linux-nat.h. */
-
-void
-linux_nat_set_forget_process (struct target_ops *t,
- linux_nat_forget_process_ftype *fn)
-{
- /* Save the pointer. */
- linux_nat_forget_process_hook = fn;
-}
-
-/* See declaration in linux-nat.h. */
-
-void
-linux_nat_forget_process (pid_t pid)
-{
- if (linux_nat_forget_process_hook != NULL)
- linux_nat_forget_process_hook (pid);
-}
-
-/* Register a method that converts a siginfo object between the layout
- that ptrace returns, and the layout in the architecture of the
- inferior. */
-void
-linux_nat_set_siginfo_fixup (struct target_ops *t,
- int (*siginfo_fixup) (siginfo_t *,
- gdb_byte *,
- int))
-{
- /* Save the pointer. */
- linux_nat_siginfo_fixup = siginfo_fixup;
-}
-
-/* Register a method to call prior to resuming a thread. */
-
-void
-linux_nat_set_prepare_to_resume (struct target_ops *t,
- void (*prepare_to_resume) (struct lwp_info *))
-{
- /* Save the pointer. */
- linux_nat_prepare_to_resume = prepare_to_resume;
}
/* See linux-nat.h. */
{
int pid;
- pid = ptid_get_lwp (ptid);
+ pid = ptid.lwp ();
if (pid == 0)
- pid = ptid_get_pid (ptid);
+ pid = ptid.pid ();
errno = 0;
ptrace (PTRACE_GETSIGINFO, pid, (PTRACE_TYPE_ARG3) 0, siginfo);
ptid_t
current_lwp_ptid (void)
{
- gdb_assert (ptid_lwp_p (inferior_ptid));
+ gdb_assert (inferior_ptid.lwp_p ());
return inferior_ptid;
}
NULL,
&setdebuglist, &showdebuglist);
- /* Save this mask as the default. */
- sigprocmask (SIG_SETMASK, NULL, &normal_mask);
-
/* Install a SIGCHLD handler. */
sigchld_action.sa_handler = sigchld_handler;
sigemptyset (&sigchld_action.sa_mask);
sigaction (SIGCHLD, &sigchld_action, NULL);
/* Make sure we don't block SIGCHLD during a sigsuspend. */
- sigprocmask (SIG_SETMASK, NULL, &suspend_mask);
+ gdb_sigmask (SIG_SETMASK, NULL, &suspend_mask);
sigdelset (&suspend_mask, SIGCHLD);
sigemptyset (&blocked_mask);
projects / deliverable / binutils-gdb.git / blobdiff