[PATCH 2/4] Document new 'set honor-dontdump-flag' command

[Sergio Lopez <slp@redhat.com>]

2017-11-28  Sergio Lopez  <slp@redhat.com>

        * gdb.texinfo (gcore): Mention new command 'set
        honor-dontdump-flag'.
        (set honor-dontdump-flag): Document new command.
---
 gdb/doc/ChangeLog   |  6 ++++++
 gdb/doc/gdb.texinfo | 14 +++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 2a1eb76d15..cdde49a887 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-28  Sergio Lopez  <slp@redhat.com>
+
+	* gdb.texinfo (gcore): Mention new command 'set
+	honor-dontdump-flag'.
+	(set honor-dontdump-flag): Document new command.
+
 2017-11-26  Dominik Czarnota  <dominik.b.czarnota@gmail.com>
 
 	PR gdb/21945
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 675f6e7bc8..472a0fe8cc 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -11543,7 +11543,9 @@ this writing, @sc{gnu}/Linux, FreeBSD, Solaris, and S390).
 
 On @sc{gnu}/Linux, this command can take into account the value of the
 file @file{/proc/@var{pid}/coredump_filter} when generating the core
-dump (@pxref{set use-coredump-filter}).
+dump (@pxref{set use-coredump-filter}), and will honor the VM_DONTDUMP
+flag for sections where is present in the file
+@file{/proc/@var{pid}/smaps} (@pxref{set honor-dontdump-flag}).
 
 @kindex set use-coredump-filter
 @anchor{set use-coredump-filter}
@@ -11573,6 +11575,16 @@ value is currently @code{0x33}, which means that bits @code{0}
 (anonymous private mappings), @code{1} (anonymous shared mappings),
 @code{4} (ELF headers) and @code{5} (private huge pages) are active.
 This will cause these memory mappings to be dumped automatically.
+
+@kindex set honor-dontdump-flag
+@anchor{set honor-dontdump-flag}
+@item set honor-dontdump-flag on
+@itemx set honor-dontdump-flag off
+If @code{on} is specified, GDB will not dump memory regions marked
+with the VM_DONTDUMP flag. This flag is represented in
+@file{/proc/@var{pid}/smaps} with the acronym @code{dd}.
+
+The default value is @code{on}.
 @end table
 
 @node Character Sets
-- 
2.14.3