@@ -30,6 +30,7 @@ along with GCC; see the file COPYING3. If not see
#include "opts-diagnostic.h"
#include "insn-attr-common.h"
#include "common/common-target.h"
+#include "spellcheck.h"
static void set_Wstrict_aliasing (struct gcc_options *opts, int onoff);
@@ -1511,6 +1512,46 @@ const struct sanitizer_opts_s sanitizer_opts[] =
{ NULL, 0U, 0UL, false }
};
+/* A struct for describing a run of chars within a string. */
+
+struct string_fragment
+{
+ string_fragment (const char *start, size_t len)
+ : m_start (start), m_len (len) {}
+
+ const char *m_start;
+ size_t m_len;
+};
+
+/* Specialization of edit_distance_traits for string_fragment,
+ for use by get_closest_sanitizer_option. */
+
+template <>
+struct edit_distance_traits<const string_fragment &>
+{
+ static size_t get_length (const string_fragment &fragment)
+ {
+ return fragment.m_len;
+ }
+
+ static const char *get_string (const string_fragment &fragment)
+ {
+ return fragment.m_start;
+ }
+};
+
+/* Given ARG, an unrecognized sanitizer option, return the best
+ matching sanitizer option, or NULL if there isn't one. */
+
+static const char *
+get_closest_sanitizer_option (const string_fragment &arg)
+{
+ best_match <const string_fragment &, const char*> bm (arg);
+ for (int i = 0; sanitizer_opts[i].name != NULL; ++i)
+ bm.consider (sanitizer_opts[i].name);
+ return bm.get_best_meaningful_candidate ();
+}
+
/* Parse comma separated sanitizer suboptions from P for option SCODE,
adjust previous FLAGS and return new ones. If COMPLAIN is false,
don't issue diagnostics. */
@@ -1572,8 +1613,20 @@ parse_sanitizer_options (const char *p, location_t loc, int scode,
}
if (! found && complain)
- error_at (loc, "unrecognized argument to -fsanitize%s= option: %q.*s",
- code == OPT_fsanitize_ ? "" : "-recover", (int) len, p);
+ {
+ const char *optname
+ = code == OPT_fsanitize_ ? "-fsanitize" : "-fsanitize-recover";
+ const char *hint
+ = get_closest_sanitizer_option (string_fragment (p, len));
+
+ if (hint)
+ error_at (loc, "unrecognized argument to %s= option: %q.*s;"
+ " did you mean %qs",
+ optname, (int) len, p, hint);
+ else
+ error_at (loc, "unrecognized argument to %s= option: %q.*s",
+ optname, (int) len, p);
+ }
if (comma == NULL)
break;
new file mode 100644
@@ -0,0 +1,8 @@
+/* Verify that we offer suggestions for misspelled sanitizer options
+ (PR driver/78877). */
+
+/* { dg-do compile } */
+/* { dg-options "-fsanitize=addres,nul,this-is-not-a-sanitizer-option" } */
+/* { dg-error "unrecognized argument to -fsanitize= option: .addres.; did you mean .address." "" { target *-*-* } 0 } */
+/* { dg-error "unrecognized argument to -fsanitize= option: .nul.; did you mean .null." "" { target *-*-* } 0 } */
+/* { dg-error "unrecognized argument to -fsanitize= option: .this-is-not-a-sanitizer-option." "" { target *-*-* } 0 } */