+2015-04-17 Yury Gribov <y.gribov@samsung.com>
+
+ * asan.c (set_sanitized_sections): New function.
+ (section_sanitized_p): Ditto.
+ (asan_protect_global): Optionally sanitize user-defined
+ sections.
+ * asan.h (set_sanitized_sections): Declare new function.
+ * common.opt (fsanitize-sections): New option.
+ * doc/invoke.texi (-fsanitize-sections): Document new option.
+ * opts-global.c (handle_common_deferred_options): Handle new
+ option.
+
2015-04-17 Jakub Jelinek <jakub@redhat.com>
PR debug/65771
static unsigned HOST_WIDE_INT asan_shadow_offset_value;
static bool asan_shadow_offset_computed;
+static const char *sanitized_sections;
/* Sets shadow offset to value in string VAL. */
return true;
}
+/* Set list of user-defined sections that need to be sanitized. */
+
+void
+set_sanitized_sections (const char *secs)
+{
+ sanitized_sections = secs;
+}
+
+/* Checks whether section SEC should be sanitized. */
+
+static bool
+section_sanitized_p (const char *sec)
+{
+ if (!sanitized_sections)
+ return false;
+ size_t len = strlen (sec);
+ const char *p = sanitized_sections;
+ while ((p = strstr (p, sec)))
+ {
+ if ((p == sanitized_sections || p[-1] == ',')
+ && (p[len] == 0 || p[len] == ','))
+ return true;
+ ++p;
+ }
+ return false;
+}
+
/* Returns Asan shadow offset. */
static unsigned HOST_WIDE_INT
to be an array of such vars, putting padding in there
breaks this assumption. */
|| (DECL_SECTION_NAME (decl) != NULL
- && !symtab_node::get (decl)->implicit_section)
+ && !symtab_node::get (decl)->implicit_section
+ && !section_sanitized_p (DECL_SECTION_NAME (decl)))
|| DECL_SIZE (decl) == 0
|| ASAN_RED_ZONE_SIZE * BITS_PER_UNIT > MAX_OFILE_ALIGNMENT
|| !valid_constant_size_p (DECL_SIZE_UNIT (decl))
extern bool set_asan_shadow_offset (const char *);
+extern void set_sanitized_sections (const char *);
+
/* Return TRUE if builtin with given FCODE will be intercepted by
libasan. */
Common Joined RejectNegative Var(common_deferred_options) Defer
-fasan-shadow-offset=<number> Use custom shadow memory offset.
+fsanitize-sections=
+Common Joined RejectNegative Var(common_deferred_options) Defer
+-fsanitize-sections=<sec1,sec2,...> Sanitize global variables
+in user-defined sections.
+
fsanitize-recover=
Common Report Joined
After diagnosing undefined behavior attempt to continue execution
@xref{Debugging Options,,Options for Debugging Your Program or GCC}.
@gccoptlist{-d@var{letters} -dumpspecs -dumpmachine -dumpversion @gol
-fsanitize=@var{style} -fsanitize-recover -fsanitize-recover=@var{style} @gol
--fasan-shadow-offset=@var{number} -fsanitize-undefined-trap-on-error @gol
+-fasan-shadow-offset=@var{number} -fsanitize-sections=@var{s1,s2,...} @gol
+-fsanitize-undefined-trap-on-error @gol
-fcheck-pointer-bounds -fchkp-check-incomplete-type @gol
-fchkp-first-field-has-own-bounds -fchkp-narrow-bounds @gol
-fchkp-narrow-to-innermost-array -fchkp-optimize @gol
It is useful for experimenting with different shadow memory layouts in
Kernel AddressSanitizer.
+@item -fsanitize-sections=@var{s1,s2,...}
+@opindex fsanitize-sections
+Sanitize global variables in selected user-defined sections.
+
@item -fsanitize-recover@r{[}=@var{opts}@r{]}
@opindex fsanitize-recover
@opindex fno-sanitize-recover
error ("unrecognized shadow offset %qs", opt->arg);
break;
+ case OPT_fsanitize_sections_:
+ set_sanitized_sections (opt->arg);
+ break;
+
default:
gcc_unreachable ();
}
+2015-04-17 Yury Gribov <y.gribov@samsung.com>
+
+ * c-c++-common/asan/user-section-1.c: New test.
+
2015-04-17 Jakub Jelinek <jakub@redhat.com>
PR debug/65771