bootstrap-ubsan.mk (POSTSTAGE1_LDFLAGS): Add -ldl.

config/
	* bootstrap-ubsan.mk (POSTSTAGE1_LDFLAGS): Add -ldl.
gcc/c-family/
	* c-ubsan.c (ubsan_instrument_division): Adjust ubsan_create_data
	call.
	(ubsan_instrument_shift): Likewise.
	(ubsan_instrument_vla): Likewise.
gcc/
	* opts.c (common_handle_option): Add -fsanitize=null option.
	Turn off -fdelete-null-pointer-checks option when doing the
	NULL pointer checking.
	* sanitizer.def (BUILT_IN_UBSAN_HANDLE_TYPE_MISMATCH): Add.
	* tree-pass.h (make_pass_ubsan): Declare.
	(make_pass_sanopt): Declare.
	* timevar.def (TV_TREE_UBSAN): New timevar.
	* passes.def: Add pass_sanopt and pass_ubsan.
	* ubsan.h (ubsan_null_ckind): New enum.
	(ubsan_mismatch_data): New struct.
	(ubsan_expand_null_ifn): Declare.
	(ubsan_create_data): Adjust declaration.
	(ubsan_type_descriptor): Likewise.
	* asan.c: Include "ubsan.h".
	(pass_data_sanopt): New pass.
	(execute_sanopt): New function.
	(gate_sanopt): Likewise.
	(make_pass_sanopt): Likewise.
	(class pass_sanopt): New class.
	* ubsan.c: Include tree-pass.h, gimple-ssa.h, gimple-walk.h,
	gimple-iterator.h and cfgloop.h. 
	(PROB_VERY_UNLIKELY): Define.
	(tree_type_map_hash): New function.
	(ubsan_type_descriptor): Add new parameter.
	Improve type name generation.
	(ubsan_create_data): Add new parameter.  Add pointer data into
	ubsan structure.
	(ubsan_expand_null_ifn): New function.
	(instrument_member_call): Likewise.
	(instrument_mem_ref): Likewise.
	(instrument_null): Likewise.
	(ubsan_pass): Likewise.
	(gate_ubsan): Likewise.
	(make_pass_ubsan): Likewise.
	(ubsan_instrument_unreachable): Adjust ubsan_create_data call.
	(class pass_ubsan): New class.
	(pass_data_ubsan): New pass.
	* flag-types.h (enum sanitize_code): Add SANITIZE_NULL.
	* internal-fn.c (expand_UBSAN_NULL): New function.
	* cgraphunit.c (varpool_finalize_decl): Call varpool_assemble_decl
	even when !flag_toplevel_reorder.
	* internal-fn.def (UBSAN_NULL): New.
gcc/testsuite/
	* c-c++-common/ubsan/null-1.c: New test.
	* c-c++-common/ubsan/null-2.c: New test.
	* c-c++-common/ubsan/null-3.c: New test.
	* c-c++-common/ubsan/null-4.c: New test.
	* c-c++-common/ubsan/null-5.c: New test.
	* c-c++-common/ubsan/null-6.c: New test.
	* c-c++-common/ubsan/null-7.c: New test.
	* c-c++-common/ubsan/null-8.c: New test.
	* c-c++-common/ubsan/null-9.c: New test.
	* c-c++-common/ubsan/null-10.c: New test.
	* c-c++-common/ubsan/null-11.c: New test.
	* gcc.dg/ubsan/c99-shift-2.c: Adjust dg-output.
	* c-c++-common/ubsan/shift-1.c: Likewise.
	* c-c++-common/ubsan/div-by-zero-3.c: Likewise.

From-SVN: r205021

1 files changed, 5 insertions, 0 deletions

diff --git a/gcc/opts.c b/gcc/opts.c
index 3a939ac..89cfe5c 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1446,6 +1446,7 @@ common_handle_option (struct gcc_options *opts,
 	      { "unreachable", SANITIZE_UNREACHABLE,
 		sizeof "unreachable" - 1 },
 	      { "vla-bound", SANITIZE_VLA, sizeof "vla-bound" - 1 },
+	      { "null", SANITIZE_NULL, sizeof "null" - 1 },
 	      { NULL, 0, 0 }
 	    };
 	    const char *comma;
@@ -1487,6 +1488,10 @@ common_handle_option (struct gcc_options *opts,
 	    p = comma + 1;
 	  }
 
+	/* When instrumenting the pointers, we don't want to remove
+	   the null pointer checks.  */
+	if (flag_sanitize & SANITIZE_NULL)
+	  opts->x_flag_delete_null_pointer_checks = 0;
 	break;
       }