/* GNU/Linux native-dependent code common to multiple platforms.
- Copyright (C) 2001-2019 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 "common/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 "common/agent.h"
+#include "gdbsupport/agent.h"
#include "tracepoint.h"
-#include "common/buffer.h"
+#include "gdbsupport/buffer.h"
#include "target-descriptions.h"
-#include "common/filestuff.h"
+#include "gdbsupport/filestuff.h"
#include "objfiles.h"
#include "nat/linux-namespaces.h"
-#include "common/fileio.h"
-#include "common/scope-exit.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.
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);
}
else
{
- scoped_restore save_inferior_ptid
- = make_scoped_restore (&inferior_ptid);
- inferior_ptid = child_ptid;
+ /* Switching inferior_ptid is not enough, because then
+ inferior_thread () would crash by not finding the thread
+ in the current inferior. */
+ scoped_restore_current_thread restore_current_thread;
+ thread_info *child = find_thread_ptid (this, child_ptid);
+ switch_to_thread (child);
/* Let the thread_db layer learn about this new process. */
check_for_thread_db ();
\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. */
\f
/* Prototypes for local functions. */
-static int stop_wait_callback (struct lwp_info *lp, void *data);
-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
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;
if (lp->ptid.matches (filter))
{
- if ((*callback) (lp, data) != 0)
+ if (callback (lp) != 0)
return lp;
}
}
/* This changes the thread's ptid while preserving the gdb thread
num. Also changes the inferior pid, while preserving the
inferior num. */
- thread_change_ptid (inferior_ptid, new_ptid);
+ thread_change_ptid (linux_target, inferior_ptid, new_ptid);
/* We've just told GDB core that the thread changed target id, but,
in fact, it really is a different thread, with different register
static void
exit_lwp (struct lwp_info *lp)
{
- struct thread_info *th = find_thread_ptid (lp->ptid);
+ struct thread_info *th = find_thread_ptid (linux_target, lp->ptid);
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 (th);
}
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);
/* Also add the LWP to gdb's thread list, in case a
matching libthread_db is not found (or the process uses
raw clone). */
- add_thread (lp->ptid);
- set_running (lp->ptid, 1);
- set_executing (lp->ptid, 1);
+ add_thread (linux_target, lp->ptid);
+ set_running (linux_target, lp->ptid, 1);
+ set_executing (linux_target, lp->ptid, 1);
}
return 1;
/* Make sure we report all signals during attach. */
pass_signals ({});
- TRY
+ try
{
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_t (inferior_ptid.pid (),
inferior_ptid.pid (),
0);
- thread_change_ptid (inferior_ptid, ptid);
+ thread_change_ptid (linux_target, inferior_ptid, ptid);
/* Add the initial process as the first LWP to the list. */
lp = add_initial_lwp (ptid);
signo = gdb_signal_from_host (WSTOPSIG (lp->status));
else
{
- struct thread_info *tp = find_thread_ptid (lp->ptid);
+ struct thread_info *tp = find_thread_ptid (linux_target, lp->ptid);
if (target_is_non_stop_p () && !tp->executing)
{
}
else if (!target_is_non_stop_p ())
{
- struct target_waitstatus last;
ptid_t last_ptid;
+ process_stratum_target *last_target;
- get_last_target_status (&last_ptid, &last);
+ get_last_target_status (&last_target, &last_ptid, nullptr);
- if (lp->ptid.lwp () == last_ptid.lwp ())
+ if (last_target == linux_target
+ && 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);
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
{
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
inferiors running. */
/* Stop all threads before detaching. ptrace requires that the
- thread is stopped to sucessfully detach. */
- iterate_over_lwps (ptid_t (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 (ptid_t (pid), stop_wait_callback, NULL);
+ iterate_over_lwps (ptid_t (pid), stop_wait_callback);
- iterate_over_lwps (ptid_t (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);
handle the case of stepping a breakpoint instruction). */
if (step)
{
- struct regcache *regcache = get_thread_regcache (lp->ptid);
+ struct regcache *regcache = get_thread_regcache (linux_target, lp->ptid);
lp->stop_pc = regcache_read_pc (regcache);
}
lp->stopped = 0;
lp->core = -1;
lp->stop_reason = TARGET_STOPPED_BY_NO_REASON;
- registers_changed_ptid (lp->ptid);
+ registers_changed_ptid (linux_target, lp->ptid);
}
/* Called when we try to resume a stopped LWP and that errors out. If
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 (lp->stopped)
{
- struct inferior *inf = find_inferior_ptid (lp->ptid);
+ struct inferior *inf = find_inferior_ptid (linux_target, lp->ptid);
if (inf->vfork_child != NULL)
{
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;
{
struct thread_info *thread;
- thread = find_thread_ptid (lp->ptid);
+ thread = find_thread_ptid (linux_target, lp->ptid);
if (thread != NULL)
{
signo = thread->suspend.stop_signal;
}
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;
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 = (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);
- thread_info *thread = find_thread_ptid (lp->ptid);
+ thread_info *thread = find_thread_ptid (linux_target, lp->ptid);
int syscall_number = (int) gdbarch_get_syscall_number (gdbarch, thread);
if (stopping)
/* The process is not using thread_db. Add the LWP to
GDB's list. */
target_post_attach (new_lp->ptid.lwp ());
- add_thread (new_lp->ptid);
+ add_thread (linux_target, new_lp->ptid);
}
/* Even if we're stopping the thread for some reason
internal to this module, from the perspective of infrun
and the user/frontend, this new thread is running until
it next reports a stop. */
- set_running (new_lp->ptid, 1);
- set_executing (new_lp->ptid, 1);
+ set_running (linux_target, new_lp->ptid, 1);
+ set_executing (linux_target, new_lp->ptid, 1);
if (WSTOPSIG (status) != SIGSTOP)
{
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;
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;
}
{
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));
}
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 (lp->ptid.pid ());
+ inferior *inf = find_inferior_pid (linux_target, lp->ptid.pid ());
int options = linux_nat_ptrace_options (inf->attach_flag);
linux_enable_event_reporting (lp->ptid.lwp (), options);
/* 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 (lp->ptid.lwp (), SIGSTOP);
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 (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;
}
}
/* 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);
+ inferior *inf = find_inferior_ptid (linux_target, lp->ptid);
/* If this is a vfork parent, bail out, it is not going to report
any SIGSTOP until the vfork is done with. */
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;
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 ());
lp->signalled = 0;
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 (lp->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT
|| lp->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT)
{
- struct regcache *regcache = get_thread_regcache (lp->ptid);
+ struct regcache *regcache = get_thread_regcache (linux_target, lp->ptid);
CORE_ADDR pc;
int discard = 0;
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. */
if (!linux_target->low_status_is_event (lp->status))
return;
- regcache = get_thread_regcache (lp->ptid);
+ regcache = get_thread_regcache (linux_target, lp->ptid);
gdbarch = regcache->arch ();
pc = regcache_read_pc (regcache);
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;
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;
}
lp = add_lwp (ptid_t (lwpid, lwpid, 0));
lp->stopped = 1;
lp->resumed = 1;
- add_thread (lp->ptid);
+ add_thread (linux_target, lp->ptid);
}
if (WIFSTOPPED (status) && !lp)
if (WIFSTOPPED (status) && lp->must_set_ptrace_flags)
{
- struct inferior *inf = find_inferior_pid (lp->ptid.pid ());
+ inferior *inf = find_inferior_pid (linux_target, lp->ptid.pid ());
int options = linux_nat_ptrace_options (inf->attach_flag);
linux_enable_event_reporting (lp->ptid.lwp (), options);
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,
"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 (ptid_t (lp->ptid.pid ()),
- 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 (linux_target, 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"));
if (inferior_ptid.is_pid ())
{
/* Upgrade the main thread's ptid. */
- thread_change_ptid (inferior_ptid,
+ thread_change_ptid (linux_target, inferior_ptid,
ptid_t (inferior_ptid.pid (),
inferior_ptid.pid (), 0));
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
if (lp->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT
&& !USE_SIGTRAP_SIGINFO)
{
- struct regcache *regcache = get_thread_regcache (lp->ptid);
+ struct regcache *regcache = get_thread_regcache (linux_target, lp->ptid);
struct gdbarch *gdbarch = regcache->arch ();
int decr_pc = gdbarch_decr_pc_after_break (gdbarch);
{
/* 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_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 regcache *regcache = get_thread_regcache (linux_target, 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 (!lp->ptid.matches (*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;
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),
+ target_pid_to_str (ptid).c_str (),
options_string.c_str ());
}
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 (ptid, ourstatus, target_options);
/* Callback for iterate_over_lwps. */
static int
-kill_callback (struct lwp_info *lp, void *data)
+kill_callback (struct lwp_info *lp)
{
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 (lp->ptid.lwp ());
return 0;
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);
const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
ULONGEST *xfered_len);
-static enum target_xfer_status
-linux_proc_xfer_spu (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,
return linux_nat_xfer_osdata (object, annex, readbuf, writebuf,
offset, len, xfered_len);
- if (object == TARGET_OBJECT_SPU)
- return linux_proc_xfer_spu (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
}
}
-const char *
+std::string
linux_nat_target::pid_to_str (ptid_t ptid)
{
- static char buf[64];
-
if (ptid.lwp_p ()
&& (ptid.pid () != ptid.lwp ()
|| num_lwps (ptid.pid ()) > 1))
- {
- snprintf (buf, sizeof (buf), "LWP %ld", ptid.lwp ());
- return buf;
- }
+ return string_printf ("LWP %ld", ptid.lwp ());
return normal_pid_to_str (ptid);
}
}
-/* 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 (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 = inferior_ptid.lwp ();
-
- 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
return previous;
}
+int
+linux_nat_target::async_wait_fd ()
+{
+ return linux_nat_event_pipe[0];
+}
+
/* target_async implementation. */
void
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)
return 0;
}
- stop_callback (lwp, NULL);
+ stop_callback (lwp);
lwp->last_resume_kind = resume_stop;
}
else
if (debug_linux_nat)
{
- if (find_thread_ptid (lwp->ptid)->stop_requested)
+ if (find_thread_ptid (linux_target, 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;
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);
}
void
pid = ptid.pid ();
}
- inf = find_inferior_pid (pid);
+ inf = find_inferior_pid (this, pid);
gdb_assert (inf != NULL);
return inf->aspace;
}
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