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, 84 insertions, 0 deletions

diff --git a/gcc/asan.c b/gcc/asan.c
index 4353db63160..d940b2c0f43 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -42,6 +42,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "alloc-pool.h"
 #include "cfgloop.h"
 #include "gimple-builder.h"
+#include "ubsan.h"
 
 /* AddressSanitizer finds out-of-bounds and use-after-free bugs
    with <2x slowdown on average.
@@ -2370,4 +2371,87 @@ make_pass_asan_O0 (gcc::context *ctxt)
   return new pass_asan_O0 (ctxt);
 }
 
+/* Perform optimization of sanitize functions.  */
+
+static unsigned int
+execute_sanopt (void)
+{
+  basic_block bb;
+
+  FOR_EACH_BB (bb)
+    {
+      gimple_stmt_iterator gsi;
+      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+	{
+	  gimple stmt = gsi_stmt (gsi);
+
+	  if (!is_gimple_call (stmt))
+	    continue;
+
+	  if (gimple_call_internal_p (stmt))
+	    switch (gimple_call_internal_fn (stmt))
+	      {
+	      case IFN_UBSAN_NULL:
+		ubsan_expand_null_ifn (gsi);
+		break;
+	      default:
+		break;
+	      }
+
+	  if (dump_file && (dump_flags & TDF_DETAILS))
+	    {
+	      fprintf (dump_file, "Optimized\n  ");
+	      print_gimple_stmt (dump_file, stmt, 0, dump_flags);
+	      fprintf (dump_file, "\n");
+	    }
+	}
+    }
+  return 0;
+}
+
+static bool
+gate_sanopt (void)
+{
+  return flag_sanitize;
+}
+
+namespace {
+
+const pass_data pass_data_sanopt =
+{
+  GIMPLE_PASS, /* type */
+  "sanopt", /* name */
+  OPTGROUP_NONE, /* optinfo_flags */
+  true, /* has_gate */
+  true, /* has_execute */
+  TV_NONE, /* tv_id */
+  ( PROP_ssa | PROP_cfg | PROP_gimple_leh ), /* properties_required */
+  0, /* properties_provided */
+  0, /* properties_destroyed */
+  0, /* todo_flags_start */
+  ( TODO_verify_flow | TODO_verify_stmts
+    | TODO_update_ssa ), /* todo_flags_finish */
+};
+
+class pass_sanopt : public gimple_opt_pass
+{
+public:
+  pass_sanopt (gcc::context *ctxt)
+    : gimple_opt_pass (pass_data_sanopt, ctxt)
+  {}
+
+  /* opt_pass methods: */
+  bool gate () { return gate_sanopt (); }
+  unsigned int execute () { return execute_sanopt (); }
+
+}; // class pass_sanopt
+
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_sanopt (gcc::context *ctxt)
+{
+  return new pass_sanopt (ctxt);
+}
+
 #include "gt-asan.h"