From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 24 Sep 2018 11:23:35 +0000 (+0000)
Subject: Guard memory block allocation.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b3b6c6ff34f60419f189b07ef086fc6a646145d3;p=thirdparty%2Fgcc.git

Guard memory block allocation.

2018-09-24  Martin Liska  <mliska@suse.cz>

	* memory-block.h (memory_block_pool::release): Annotate with
	valgrind that the memory is not accessible.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@264529 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fc16b257d5af..de6973aa3384 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-09-24  Martin Liska  <mliska@suse.cz>
+
+	* memory-block.h (memory_block_pool::release): Annotate with
+	valgrind that the memory is not accessible.
+
 2018-09-24  Martin Liska  <mliska@suse.cz>
 
 	PR sanitizer/85774
diff --git a/gcc/memory-block.h b/gcc/memory-block.h
index 5440428240d0..c045d2e95ab2 100644
--- a/gcc/memory-block.h
+++ b/gcc/memory-block.h
@@ -68,6 +68,11 @@ memory_block_pool::release (void *uncast_block)
   block_list *block = new (uncast_block) block_list;
   block->m_next = instance.m_blocks;
   instance.m_blocks = block;
+
+  VALGRIND_DISCARD (VALGRIND_MAKE_MEM_NOACCESS ((char *)uncast_block
+						+ sizeof (block_list),
+						block_size
+						- sizeof (block_list)));
 }
 
 extern void *mempool_obstack_chunk_alloc (size_t) ATTRIBUTE_MALLOC;