[pushed][PATCH 1/3] Linux gdbserver fork event debug output (Re: [PATCH/7.10 1/2] Linux gdbserver confused when event randomization returns a process exit event)

[Pedro Alves <palves at redhat dot com>]

On 08/03/2015 11:58 AM, Yao Qi wrote:

> Looks this code is dead code even without your patch. This code is
> guarded by "if (!report_to_gdb)", but if report_to_gdb is false,
> "(event_child->waitstatus.kind != TARGET_WAITKIND_IGNORE)" is false too.
> 

Indeed.  I've pushed this preliminary patch, to address that.

Thanks!

--------
>From ad071a3055b9b47dad340c1a1cb3a9b39529cef0 Mon Sep 17 00:00:00 2001
From: Pedro Alves <palves@redhat.com>
Date: Thu, 6 Aug 2015 10:30:16 +0100
Subject: [PATCH 1/3] Linux gdbserver fork event debug output

The "extended event with waitstatus" debug output is unreachable, as
it is guarded by "if (!report_to_gdb)".  If extended_event_reported is
true, then so is report_to_gdb.  Move it to where we print why we're
reporting an event to GDB.

Also, the debug output currently tries to print the wrong struct
target_waitstatus.

gdb/gdbserver/ChangeLog:
2015-08-06  Pedro Alves  <palves@redhat.com>

	* linux-low.c (linux_wait_1): Move fork event output out of the
	!report_to_gdb check.  Pass event_child->waitstatus to
	target_waitstatus_to_string instead of ourstatus.
---
 gdb/gdbserver/ChangeLog   |  6 ++++++
 gdb/gdbserver/linux-low.c | 16 +++++++++-------
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 43cae40..eb1101c 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,9 @@
+2015-08-06  Pedro Alves  <palves@redhat.com>
+
+	* linux-low.c (linux_wait_1): Move fork event output out of the
+	!report_to_gdb check.  Pass event_child->waitstatus to
+	target_waitstatus_to_string instead of ourstatus.
+
 2015-08-04  Yao Qi  <yao.qi@linaro.org>
 
 	* linux-aarch64-low.c (aarch64_supports_tracepoints): Return 0
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index f1e1d72..76b212d 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -3153,13 +3153,6 @@ linux_wait_1 (ptid_t ptid,
 			  paddress (event_child->stop_pc),
 			  paddress (event_child->step_range_start),
 			  paddress (event_child->step_range_end));
-	  if (extended_event_reported (&event_child->waitstatus))
-	    {
-	      char *str = target_waitstatus_to_string (ourstatus);
-	      debug_printf ("LWP %ld: extended event with waitstatus %s\n",
-			    lwpid_of (get_lwp_thread (event_child)), str);
-	      xfree (str);
-	    }
 	}
 
       /* We're not reporting this breakpoint to GDB, so apply the
@@ -3190,6 +3183,15 @@ linux_wait_1 (ptid_t ptid,
 
   if (debug_threads)
     {
+      if (extended_event_reported (&event_child->waitstatus))
+	{
+	  char *str;
+
+	  str = target_waitstatus_to_string (&event_child->waitstatus);
+	  debug_printf ("LWP %ld: extended event with waitstatus %s\n",
+			lwpid_of (get_lwp_thread (event_child)), str);
+	  xfree (str);
+	}
       if (current_thread->last_resume_kind == resume_step)
 	{
 	  if (event_child->step_range_start == event_child->step_range_end)
-- 
1.9.3