gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / linux-nat.c

diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 45b71ea8627fbf372a7af854a703dd22ad5aa138..0a2bfdc57d48624936f4b85ab55f2194f3a7d75d 100644 (file)
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -47,7 +47,7 @@
 #include <sys/stat.h>          /* for struct stat */
 #include <fcntl.h>             /* for O_RDONLY */
 #include "inf-loop.h"
-#include "event-loop.h"
+#include "gdbsupport/event-loop.h"
 #include "event-top.h"
 #include <pwd.h>
 #include <sys/types.h>
@@ -440,8 +440,8 @@ typedef std::unique_ptr<struct lwp_info, lwp_deleter> lwp_info_up;
    ptid of the followed inferior.  At return, inferior_ptid will be
    unchanged.  */
 
-int
-linux_nat_target::follow_fork (int follow_child, int detach_fork)
+bool
+linux_nat_target::follow_fork (bool follow_child, bool detach_fork)
 {
   if (!follow_child)
     {
@@ -611,7 +611,7 @@ linux_nat_target::follow_fork (int follow_child, int detach_fork)
       check_for_thread_db ();
     }
 
-  return 0;
+  return false;
 }
 
 \f
@@ -1166,8 +1166,8 @@ attach_proc_task_lwp_callback (ptid_t ptid)
             matching libthread_db is not found (or the process uses
             raw clone).  */
          add_thread (linux_target, lp->ptid);
-         set_running (linux_target, lp->ptid, 1);
-         set_executing (linux_target, lp->ptid, 1);
+         set_running (linux_target, lp->ptid, true);
+         set_executing (linux_target, lp->ptid, true);
        }
 
       return 1;
@@ -1700,7 +1700,8 @@ linux_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo)
   resume_many = (minus_one_ptid == ptid
                 || ptid.is_pid ());
 
-  /* Mark the lwps we're resuming as resumed.  */
+  /* Mark the lwps we're resuming as resumed and update their
+     last_resume_kind to resume_continue.  */
   iterate_over_lwps (ptid, resume_set_callback);
 
   /* See if it's the current inferior that should be handled
@@ -1977,6 +1978,10 @@ linux_handle_extended_wait (struct lwp_info *lp, int status)
             inferior.  */
          linux_target->low_new_fork (lp, new_pid);
        }
+      else if (event == PTRACE_EVENT_CLONE)
+       {
+         linux_target->low_new_clone (lp, new_pid);
+       }
 
       if (event == PTRACE_EVENT_FORK
          && linux_fork_checkpointing_p (lp->ptid.pid ()))
@@ -2037,8 +2042,8 @@ linux_handle_extended_wait (struct lwp_info *lp, int status)
             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 (linux_target, new_lp->ptid, 1);
-         set_executing (linux_target, new_lp->ptid, 1);
+         set_running (linux_target, new_lp->ptid, true);
+         set_executing (linux_target, new_lp->ptid, true);
 
          if (WSTOPSIG (status) != SIGSTOP)
            {
@@ -2725,7 +2730,7 @@ save_stop_reason (struct lwp_info *lp)
            {
              /* If we determine the LWP stopped for a SW breakpoint,
                 trust it.  Particularly don't check watchpoint
-                registers, because at least on s390, we'd find
+                registers, because, at least on s390, we'd find
                 stopped-by-watchpoint as long as there's a watchpoint
                 set.  */
              lp->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
@@ -2929,7 +2934,7 @@ resumed_callback (struct lwp_info *lp)
 }
 
 /* Check if we should go on and pass this event to common code.
-   Return the affected lwp if we are, or NULL otherwise.  */
+   Return the affected lwp if we should, or NULL otherwise.  */
 
 static struct lwp_info *
 linux_nat_filter_event (int lwpid, int status)
@@ -3122,7 +3127,7 @@ linux_nat_filter_event (int lwpid, int status)
 
   /* Don't report signals that GDB isn't interested in, such as
      signals that are neither printed nor stopped upon.  Stopping all
-     threads can be a bit time-consuming so if we want decent
+     threads can be a bit time-consuming, so if we want decent
      performance with heavily multi-threaded programs, especially when
      they're using a high frequency timer, we'd better avoid it if we
      can.  */
@@ -4212,8 +4217,7 @@ sigchld_handler (int signo)
   int old_errno = errno;
 
   if (debug_linux_nat)
-    ui_file_write_async_safe (gdb_stdlog,
-                             "sigchld\n", sizeof ("sigchld\n") - 1);
+    gdb_stdlog->write_async_safe ("sigchld\n", sizeof ("sigchld\n") - 1);
 
   if (signo == SIGCHLD
       && linux_nat_event_pipe[0] != -1)
@@ -4545,8 +4549,9 @@ current_lwp_ptid (void)
   return inferior_ptid;
 }
 
+void _initialize_linux_nat ();
 void
-_initialize_linux_nat (void)
+_initialize_linux_nat ()
 {
   add_setshow_zuinteger_cmd ("lin-lwp", class_maintenance,
                             &debug_linux_nat, _("\