Implement no_sanitize function attribute

2017-06-13  Martin Liska  <mliska@suse.cz>

	PR sanitize/78204
	* c-c++-common/ubsan/attrib-2.c (float_cast2): Enhance the
	test by adding no_sanitize attribute.
	* gcc.dg/asan/use-after-scope-4.c: Likewise.
2017-06-13  Martin Liska  <mliska@suse.cz>

	PR sanitize/78204
	* c-attribs.c (add_no_sanitize_value): New function.
	(handle_no_sanitize_attribute): Likewise.
	(handle_no_sanitize_address_attribute): Use the function.
	(handle_no_sanitize_thread_attribute): New function.
	(handle_no_address_safety_analysis_attribute): Use
	add_no_sanitize_value.
	(handle_no_sanitize_undefined_attribute): Likewise.
	* c-common.h: Declare new functions.
	* c-ubsan.c (ubsan_instrument_division): Use sanitize_flags_p.
	(ubsan_instrument_shift): Likewise.
	(ubsan_instrument_bounds): Likewise.
	(ubsan_maybe_instrument_array_ref): Likewise.
	(ubsan_maybe_instrument_reference_or_call): Likewise.
2017-06-13  Martin Liska  <mliska@suse.cz>

	PR sanitize/78204
	* asan.c (asan_sanitize_stack_p): Use sanitize_flags_p.
	(gate_asan): Likewise.
	* asan.h (asan_no_sanitize_address_p): Remove the function.
	(sanitize_flags_p): New function.
	* builtins.def: Fix coding style.
	* common.opt: Use renamed enum value.
	* convert.c (convert_to_integer_1): Use sanitize_flags_p.
	* doc/extend.texi: Document no_sanitize attribute.
	* flag-types.h (enum sanitize_code): Rename SANITIZE_NONDEFAULT
	to SANITIZE_UNDEFINED_NONDEFAULT.
	* gcc.c (sanitize_spec_function): Use the renamed enum value.
	* gimple-fold.c (optimize_atomic_compare_exchange_p):
	Use sanitize_flags_p.
	* gimplify.c (gimplify_function_tree): Likewise.
	* ipa-inline.c (sanitize_attrs_match_for_inline_p): Likewise.
	* opts.c (parse_no_sanitize_attribute): New function.
	(common_handle_option): Use renamed enum value.
	* opts.h (parse_no_sanitize_attribute): Declare.
	* tree.c (sanitize_flags_p): New function.
	* tree.h: Declared here.
	* tsan.c: Use sanitize_flags_p.
	* ubsan.c (ubsan_expand_null_ifn): Likewise.
	(instrument_mem_ref): Likewise.
	(instrument_bool_enum_load): Likewise.
	(do_ubsan_in_current_function): Remove the function.
	(pass_ubsan::execute): Use sanitize_flags_p.
	* ubsan.h: Remove do_ubsan_in_current_function
	* tree-cfg.c (print_no_sanitize_attr_value): New function.
	(dump_function_to_file): Use it here.
2017-06-13  Martin Liska  <mliska@suse.cz>

	PR sanitize/78204
	* class.c (build_base_path): Use sanitize_flags_p.
	* cp-gimplify.c (cp_genericize_r): Likewise.
	(cp_genericize_tree): Likewise.
	(cp_genericize): Likewise.
	* cp-ubsan.c (cp_ubsan_instrument_vptr_p): Likewise.
	* decl.c (compute_array_index_type): Likewise.
	(start_preparsed_function): Likewise.
	* decl2.c (one_static_initialization_or_destruction): Likewise.
	* init.c (finish_length_check): Likewise.
	* lambda.c (maybe_add_lambda_conv_op): Likewise.
	* typeck.c (cp_build_binary_op): Likewise.
	(build_static_cast_1): Likewise.
2017-06-13  Martin Liska  <mliska@suse.cz>

	PR sanitize/78204
	* c-convert.c (convert): Use sanitize_flags_p.
	* c-decl.c (grokdeclarator): Likewise.
	* c-typeck.c (convert_for_assignment): Likewise.
	(c_finish_return): Likewise.
	(build_binary_op): Likewise.

From-SVN: r249158

1 files changed, 27 insertions, 2 deletions

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index c84e99d..7df80f8 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -60,6 +60,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "gimplify.h"
 #include "attribs.h"
 #include "selftest.h"
+#include "opts.h"
 
 /* This file contains functions for building the Control Flow Graph (CFG)
    for a function tree.  */
@@ -7555,6 +7556,25 @@ dump_default_def (FILE *file, tree def, int spc, dump_flags_t flags)
   fprintf (file, ";\n");
 }
 
+/* Print no_sanitize attribute to FILE for a given attribute VALUE.  */
+
+static void
+print_no_sanitize_attr_value (FILE *file, tree value)
+{
+  unsigned int flags = tree_to_uhwi (value);
+  bool first = true;
+  for (int i = 0; sanitizer_opts[i].name != NULL; ++i)
+    {
+      if ((sanitizer_opts[i].flag & flags) == sanitizer_opts[i].flag)
+	{
+	  if (!first)
+	    fprintf (file, " | ");
+	  fprintf (file, "%s", sanitizer_opts[i].name);
+	  first = false;
+	}
+    }
+}
+
 /* Dump FUNCTION_DECL FN to file FILE using FLAGS (see TDF_* in dumpfile.h)
    */
 
@@ -7582,11 +7602,16 @@ dump_function_to_file (tree fndecl, FILE *file, dump_flags_t flags)
 	  if (!first)
 	    fprintf (file, ", ");
 
-	  print_generic_expr (file, get_attribute_name (chain), dump_flags);
+	  tree name = get_attribute_name (chain);
+	  print_generic_expr (file, name, dump_flags);
 	  if (TREE_VALUE (chain) != NULL_TREE)
 	    {
 	      fprintf (file, " (");
-	      print_generic_expr (file, TREE_VALUE (chain), dump_flags);
+
+	      if (strstr (IDENTIFIER_POINTER (name), "no_sanitize"))
+		print_no_sanitize_attr_value (file, TREE_VALUE (chain));
+	      else
+		print_generic_expr (file, TREE_VALUE (chain), dump_flags);
 	      fprintf (file, ")");
 	    }
 	}