asan.c (pass_sanopt::execute): Handle IFN_UBSAN_OBJECT_SIZE.

	* asan.c (pass_sanopt::execute): Handle IFN_UBSAN_OBJECT_SIZE.
	* doc/invoke.texi: Document -fsanitize=object-size.
	* flag-types.h (enum sanitize_code): Add SANITIZE_OBJECT_SIZE and
	or it into SANITIZE_UNDEFINED.
	* gimple-fold.c (gimple_fold_call): Optimize IFN_UBSAN_OBJECT_SIZE.
	* internal-fn.c (expand_UBSAN_OBJECT_SIZE): New function.
	* internal-fn.def (UBSAN_OBJECT_SIZE): Define.
	* opts.c (common_handle_option): Handle -fsanitize=object-size.
	* ubsan.c: Include tree-object-size.h.
	(ubsan_type_descriptor): Call tree_to_uhwi instead of tree_to_shwi. 
	(ubsan_expand_bounds_ifn): Use false instead of 0.
	(ubsan_expand_objsize_ifn): New function.
	(instrument_object_size): New function.
	(pass_ubsan::execute): Add object size instrumentation.
	* ubsan.h (ubsan_expand_objsize_ifn): Declare.
testsuite/
	* c-c++-common/ubsan/object-size-1.c: New test.
	* c-c++-common/ubsan/object-size-2.c: New test.
	* c-c++-common/ubsan/object-size-3.c: New test.
	* c-c++-common/ubsan/object-size-4.c: New test.
	* c-c++-common/ubsan/object-size-5.c: New test.
	* c-c++-common/ubsan/object-size-6.c: New test.
	* c-c++-common/ubsan/object-size-7.c: New test.
	* c-c++-common/ubsan/object-size-8.c: New test.
	* c-c++-common/ubsan/object-size-9.c: New test.
	* g++.dg/ubsan/object-size-1.C: New test.
	* gcc.dg/ubsan/object-size-9.c: New test.

From-SVN: r216099

1 files changed, 2 insertions, 0 deletions

diff --git a/gcc/opts.c b/gcc/opts.c
index 5cb5a39..3d9b6a7 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1513,6 +1513,8 @@ common_handle_option (struct gcc_options *opts,
 	      { "returns-nonnull-attribute",
 		SANITIZE_RETURNS_NONNULL_ATTRIBUTE,
 		sizeof "returns-nonnull-attribute" - 1 },
+	      { "object-size", SANITIZE_OBJECT_SIZE,
+		sizeof "object-size" - 1 },
 	      { NULL, 0, 0 }
 	    };
 	    const char *comma;