#include <sys/types.h>
#include <sys/ptrace.h>
#include <sys/sysctl.h>
+#include <sys/wait.h>
/* Return the name of a file that can be opened to get the symbols for
the child process identified by PID. */
return buf;
}
+/* Return the kinfo_proc2 structure for the process identified by PID. */
+
+static bool
+nbsd_pid_to_kinfo_proc2 (pid_t pid, struct kinfo_proc2 *kp)
+{
+ gdb_assert (kp != nullptr);
+
+ size_t size = sizeof (*kp);
+ int mib[6] = {CTL_KERN, KERN_PROC2, KERN_PROC_PID, pid,
+ static_cast<int> (size), 1};
+ return !sysctl (mib, ARRAY_SIZE (mib), kp, &size, NULL, 0);
+}
+
+/* Return the command line for the process identified by PID. */
+
+static gdb::unique_xmalloc_ptr<char[]>
+nbsd_pid_to_cmdline (int pid)
+{
+ int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_ARGV};
+
+ size_t size = 0;
+ if (sysctl (mib, ARRAY_SIZE (mib), NULL, &size, NULL, 0) == -1 || size == 0)
+ return nullptr;
+
+ gdb::unique_xmalloc_ptr<char[]> args (XNEWVAR (char, size));
+
+ if (sysctl (mib, ARRAY_SIZE (mib), args.get (), &size, NULL, 0) == -1
+ || size == 0)
+ return nullptr;
+
+ /* Arguments are returned as a flattened string with NUL separators.
+ Join the arguments with spaces to form a single string. */
+ for (size_t i = 0; i < size - 1; i++)
+ if (args[i] == '\0')
+ args[i] = ' ';
+ args[size - 1] = '\0';
+
+ return args;
+}
+
/* Generic thread (LWP) lister within a specified process. The callback
parameters is a C++ function that is called for each detected thread. */
nbsd_thread_lister (pid, fn);
}
+/* Enable additional event reporting on new processes. */
+
+static void
+nbsd_enable_proc_events (pid_t pid)
+{
+ int events;
+
+ if (ptrace (PT_GET_EVENT_MASK, pid, &events, sizeof (events)) == -1)
+ perror_with_name (("ptrace"));
+
+ events |= PTRACE_LWP_CREATE;
+ events |= PTRACE_LWP_EXIT;
+
+ if (ptrace (PT_SET_EVENT_MASK, pid, &events, sizeof (events)) == -1)
+ perror_with_name (("ptrace"));
+}
+
+/* Implement the "post_startup_inferior" target_ops method. */
+
+void
+nbsd_nat_target::post_startup_inferior (ptid_t ptid)
+{
+ nbsd_enable_proc_events (ptid.pid ());
+}
+
/* Implement the "post_attach" target_ops method. */
void
nbsd_nat_target::post_attach (int pid)
{
+ nbsd_enable_proc_events (pid);
nbsd_add_threads (this, pid);
}
void
nbsd_nat_target::update_thread_list ()
{
- prune_threads ();
-
- nbsd_add_threads (this, inferior_ptid.pid ());
+ delete_exited_threads ();
}
/* Convert PTID to a string. */
nbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
{
pid_t pid;
+ bool do_cmdline = false;
bool do_cwd = false;
bool do_exe = false;
bool do_mappings = false;
+ bool do_status = false;
switch (what)
{
+ case IP_MINIMAL:
+ do_cmdline = true;
+ do_cwd = true;
+ do_exe = true;
+ break;
+ case IP_STAT:
+ case IP_STATUS:
+ do_status = true;
+ break;
case IP_MAPPINGS:
do_mappings = true;
break;
+ case IP_CMDLINE:
+ do_cmdline = true;
+ break;
case IP_EXE:
do_exe = true;
break;
case IP_CWD:
do_cwd = true;
break;
+ case IP_ALL:
+ do_cmdline = true;
+ do_cwd = true;
+ do_exe = true;
+ do_mappings = true;
+ do_status = true;
+ break;
default:
error (_("Not supported on this target."));
}
printf_filtered (_("process %d\n"), pid);
+ if (do_cmdline)
+ {
+ gdb::unique_xmalloc_ptr<char[]> cmdline = nbsd_pid_to_cmdline (pid);
+ if (cmdline != nullptr)
+ printf_filtered ("cmdline = '%s'\n", cmdline.get ());
+ else
+ warning (_("unable to fetch command line"));
+ }
if (do_cwd)
{
std::string cwd = nbsd_pid_to_cwd (pid);
else
warning (_("unable to fetch virtual memory map"));
}
+ if (do_status)
+ {
+ struct kinfo_proc2 kp;
+ if (!nbsd_pid_to_kinfo_proc2 (pid, &kp))
+ warning (_("Failed to fetch process information"));
+ else
+ {
+ auto process_status
+ = [] (int8_t stat)
+ {
+ switch (stat)
+ {
+ case SIDL:
+ return "IDL";
+ case SACTIVE:
+ return "ACTIVE";
+ case SDYING:
+ return "DYING";
+ case SSTOP:
+ return "STOP";
+ case SZOMB:
+ return "ZOMB";
+ case SDEAD:
+ return "DEAD";
+ default:
+ return "? (unknown)";
+ }
+ };
+
+ printf_filtered ("Name: %s\n", kp.p_comm);
+ printf_filtered ("State: %s\n", process_status(kp.p_realstat));
+ printf_filtered ("Parent process: %" PRId32 "\n", kp.p_ppid);
+ printf_filtered ("Process group: %" PRId32 "\n", kp.p__pgid);
+ printf_filtered ("Session id: %" PRId32 "\n", kp.p_sid);
+ printf_filtered ("TTY: %" PRId32 "\n", kp.p_tdev);
+ printf_filtered ("TTY owner process group: %" PRId32 "\n", kp.p_tpgid);
+ printf_filtered ("User IDs (real, effective, saved): "
+ "%" PRIu32 " %" PRIu32 " %" PRIu32 "\n",
+ kp.p_ruid, kp.p_uid, kp.p_svuid);
+ printf_filtered ("Group IDs (real, effective, saved): "
+ "%" PRIu32 " %" PRIu32 " %" PRIu32 "\n",
+ kp.p_rgid, kp.p_gid, kp.p_svgid);
+
+ printf_filtered ("Groups:");
+ for (int i = 0; i < kp.p_ngroups; i++)
+ printf_filtered (" %" PRIu32, kp.p_groups[i]);
+ printf_filtered ("\n");
+ printf_filtered ("Minor faults (no memory page): %" PRIu64 "\n",
+ kp.p_uru_minflt);
+ printf_filtered ("Major faults (memory page faults): %" PRIu64 "\n",
+ kp.p_uru_majflt);
+ printf_filtered ("utime: %" PRIu32 ".%06" PRIu32 "\n",
+ kp.p_uutime_sec, kp.p_uutime_usec);
+ printf_filtered ("stime: %" PRIu32 ".%06" PRIu32 "\n",
+ kp.p_ustime_sec, kp.p_ustime_usec);
+ printf_filtered ("utime+stime, children: %" PRIu32 ".%06" PRIu32 "\n",
+ kp.p_uctime_sec, kp.p_uctime_usec);
+ printf_filtered ("'nice' value: %" PRIu8 "\n", kp.p_nice);
+ printf_filtered ("Start time: %" PRIu32 ".%06" PRIu32 "\n",
+ kp.p_ustart_sec, kp.p_ustart_usec);
+ int pgtok = getpagesize () / 1024;
+ printf_filtered ("Data size: %" PRIuMAX " kB\n",
+ (uintmax_t) kp.p_vm_dsize * pgtok);
+ printf_filtered ("Stack size: %" PRIuMAX " kB\n",
+ (uintmax_t) kp.p_vm_ssize * pgtok);
+ printf_filtered ("Text size: %" PRIuMAX " kB\n",
+ (uintmax_t) kp.p_vm_tsize * pgtok);
+ printf_filtered ("Resident set size: %" PRIuMAX " kB\n",
+ (uintmax_t) kp.p_vm_rssize * pgtok);
+ printf_filtered ("Maximum RSS: %" PRIu64 " kB\n", kp.p_uru_maxrss);
+ printf_filtered ("Pending Signals:");
+ for (size_t i = 0; i < ARRAY_SIZE (kp.p_siglist.__bits); i++)
+ printf_filtered (" %08" PRIx32, kp.p_siglist.__bits[i]);
+ printf_filtered ("\n");
+ printf_filtered ("Ignored Signals:");
+ for (size_t i = 0; i < ARRAY_SIZE (kp.p_sigignore.__bits); i++)
+ printf_filtered (" %08" PRIx32, kp.p_sigignore.__bits[i]);
+ printf_filtered ("\n");
+ printf_filtered ("Caught Signals:");
+ for (size_t i = 0; i < ARRAY_SIZE (kp.p_sigcatch.__bits); i++)
+ printf_filtered (" %08" PRIx32, kp.p_sigcatch.__bits[i]);
+ printf_filtered ("\n");
+ }
+ }
return true;
}
+
+/* Resume execution of a specified PTID, that points to a process or a thread
+ within a process. If one thread is specified, all other threads are
+ suspended. If STEP is nonzero, single-step it. If SIGNAL is nonzero,
+ give it that signal. */
+
+static void
+nbsd_resume(nbsd_nat_target *target, ptid_t ptid, int step,
+ enum gdb_signal signal)
+{
+ int request;
+
+ gdb_assert (minus_one_ptid != ptid);
+
+ if (ptid.lwp_p ())
+ {
+ /* If ptid is a specific LWP, suspend all other LWPs in the process. */
+ inferior *inf = find_inferior_ptid (target, ptid);
+
+ for (thread_info *tp : inf->non_exited_threads ())
+ {
+ if (tp->ptid.lwp () == ptid.lwp ())
+ request = PT_RESUME;
+ else
+ request = PT_SUSPEND;
+
+ if (ptrace (request, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
+ perror_with_name (("ptrace"));
+ }
+ }
+ else
+ {
+ /* If ptid is a wildcard, resume all matching threads (they won't run
+ until the process is continued however). */
+ for (thread_info *tp : all_non_exited_threads (target, ptid))
+ if (ptrace (PT_RESUME, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
+ perror_with_name (("ptrace"));
+ }
+
+ if (step)
+ {
+ for (thread_info *tp : all_non_exited_threads (target, ptid))
+ if (ptrace (PT_SETSTEP, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
+ perror_with_name (("ptrace"));
+ }
+ else
+ {
+ for (thread_info *tp : all_non_exited_threads (target, ptid))
+ if (ptrace (PT_CLEARSTEP, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
+ perror_with_name (("ptrace"));
+ }
+
+ if (catch_syscall_enabled () > 0)
+ request = PT_SYSCALL;
+ else
+ request = PT_CONTINUE;
+
+ /* An address of (void *)1 tells ptrace to continue from
+ where it was. If GDB wanted it to start some other way, we have
+ already written a new program counter value to the child. */
+ if (ptrace (request, ptid.pid (), (void *)1, gdb_signal_to_host (signal)) == -1)
+ perror_with_name (("ptrace"));
+}
+
+/* Resume execution of thread PTID, or all threads of all inferiors
+ if PTID is -1. If STEP is nonzero, single-step it. If SIGNAL is nonzero,
+ give it that signal. */
+
+void
+nbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal)
+{
+ if (minus_one_ptid != ptid)
+ nbsd_resume (this, ptid, step, signal);
+ else
+ {
+ for (inferior *inf : all_non_exited_inferiors (this))
+ nbsd_resume (this, ptid_t (inf->pid, 0, 0), step, signal);
+ }
+}
+
+/* Implement a safe wrapper around waitpid(). */
+
+static pid_t
+nbsd_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options)
+{
+ pid_t pid;
+ int status;
+
+ set_sigint_trap ();
+
+ do
+ {
+ /* The common code passes WNOHANG that leads to crashes, overwrite it. */
+ pid = waitpid (ptid.pid (), &status, 0);
+ }
+ while (pid == -1 && errno == EINTR);
+
+ clear_sigint_trap ();
+
+ if (pid == -1)
+ perror_with_name (_("Child process unexpectedly missing"));
+
+ store_waitstatus (ourstatus, status);
+ return pid;
+}
+
+/* Wait for the child specified by PTID to do something. Return the
+ process ID of the child, or MINUS_ONE_PTID in case of error; store
+ the status in *OURSTATUS. */
+
+ptid_t
+nbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
+ int target_options)
+{
+ pid_t pid = nbsd_wait (ptid, ourstatus, target_options);
+ ptid_t wptid = ptid_t (pid);
+
+ /* If the child stopped, keep investigating its status. */
+ if (ourstatus->kind != TARGET_WAITKIND_STOPPED)
+ return wptid;
+
+ /* Extract the event and thread that received a signal. */
+ ptrace_siginfo_t psi;
+ if (ptrace (PT_GET_SIGINFO, pid, &psi, sizeof (psi)) == -1)
+ perror_with_name (("ptrace"));
+
+ /* Pick child's siginfo_t. */
+ siginfo_t *si = &psi.psi_siginfo;
+
+ int lwp = psi.psi_lwpid;
+
+ int signo = si->si_signo;
+ const int code = si->si_code;
+
+ /* Construct PTID with a specified thread that received the event.
+ If a signal was targeted to the whole process, lwp is 0. */
+ wptid = ptid_t (pid, lwp, 0);
+
+ /* Bail out on non-debugger oriented signals.. */
+ if (signo != SIGTRAP)
+ return wptid;
+
+ /* Stop examining non-debugger oriented SIGTRAP codes. */
+ if (code <= SI_USER || code == SI_NOINFO)
+ return wptid;
+
+ /* Process state for threading events */
+ ptrace_state_t pst = {};
+ if (code == TRAP_LWP)
+ {
+ if (ptrace (PT_GET_PROCESS_STATE, pid, &pst, sizeof (pst)) == -1)
+ perror_with_name (("ptrace"));
+ }
+
+ if (code == TRAP_LWP && pst.pe_report_event == PTRACE_LWP_EXIT)
+ {
+ /* If GDB attaches to a multi-threaded process, exiting
+ threads might be skipped during post_attach that
+ have not yet reported their PTRACE_LWP_EXIT event.
+ Ignore exited events for an unknown LWP. */
+ thread_info *thr = find_thread_ptid (this, wptid);
+ if (thr == nullptr)
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ else
+ {
+ ourstatus->kind = TARGET_WAITKIND_THREAD_EXITED;
+ /* NetBSD does not store an LWP exit status. */
+ ourstatus->value.integer = 0;
+
+ if (print_thread_events)
+ printf_unfiltered (_("[%s exited]\n"),
+ target_pid_to_str (wptid).c_str ());
+ delete_thread (thr);
+ }
+
+ /* The GDB core expects that the rest of the threads are running. */
+ if (ptrace (PT_CONTINUE, pid, (void *) 1, 0) == -1)
+ perror_with_name (("ptrace"));
+
+ return wptid;
+ }
+
+ if (in_thread_list (this, ptid_t (pid)))
+ thread_change_ptid (this, ptid_t (pid), wptid);
+
+ if (code == TRAP_LWP && pst.pe_report_event == PTRACE_LWP_CREATE)
+ {
+ /* If GDB attaches to a multi-threaded process, newborn
+ threads might be added by nbsd_add_threads that have
+ not yet reported their PTRACE_LWP_CREATE event. Ignore
+ born events for an already-known LWP. */
+ if (in_thread_list (this, wptid))
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ else
+ {
+ add_thread (this, wptid);
+ ourstatus->kind = TARGET_WAITKIND_THREAD_CREATED;
+ }
+ return wptid;
+ }
+
+ if (code == TRAP_EXEC)
+ {
+ ourstatus->kind = TARGET_WAITKIND_EXECD;
+ ourstatus->value.execd_pathname = xstrdup (pid_to_exec_file (pid));
+ return wptid;
+ }
+
+ if (code == TRAP_TRACE)
+ {
+ /* Unhandled at this level. */
+ return wptid;
+ }
+
+ if (code == TRAP_SCE || code == TRAP_SCX)
+ {
+ int sysnum = si->si_sysnum;
+
+ if (!catch_syscall_enabled () || !catching_syscall_number (sysnum))
+ {
+ /* If the core isn't interested in this event, ignore it. */
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ return wptid;
+ }
+
+ ourstatus->kind =
+ (code == TRAP_SCE) ? TARGET_WAITKIND_SYSCALL_ENTRY :
+ TARGET_WAITKIND_SYSCALL_RETURN;
+ ourstatus->value.syscall_number = sysnum;
+ return wptid;
+ }
+
+ if (code == TRAP_BRKPT)
+ {
+ /* Unhandled at this level. */
+ return wptid;
+ }
+
+ /* Unclassified SIGTRAP event. */
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ return wptid;
+}
+
+/* Implement the "insert_exec_catchpoint" target_ops method. */
+
+int
+nbsd_nat_target::insert_exec_catchpoint (int pid)
+{
+ /* Nothing to do. */
+ return 0;
+}
+
+/* Implement the "remove_exec_catchpoint" target_ops method. */
+
+int
+nbsd_nat_target::remove_exec_catchpoint (int pid)
+{
+ /* Nothing to do. */
+ return 0;
+}
+
+/* Implement the "set_syscall_catchpoint" target_ops method. */
+
+int
+nbsd_nat_target::set_syscall_catchpoint (int pid, bool needed,
+ int any_count,
+ gdb::array_view<const int> syscall_counts)
+{
+ /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which
+ will catch all system call entries and exits. The system calls
+ are filtered by GDB rather than the kernel. */
+ return 0;
+}
projects / deliverable / binutils-gdb.git / blobdiff