Fix Rust lexer buglet

PR rust/24414 points out that the Rust lexer uses strtoul when lexing
an integer, and that this can give the wrong results in some
situations.

This patch changes it to use strtoulst, like most of the rest of gdb.
It also adds a self test.

Tested on x86-64 Fedora 29 using an i686 build.

gdb/ChangeLog
2019-04-09  Ivan Begert  <ivanbegert@gmail.com>
	    Tom Tromey  <tromey@adacore.com>

	PR rust/24414:
	* rust-exp.y (rust_parser::lex_number): Use strtoulst.
	(rust_lex_int_test): Change "value" to be LONGEST.
	(rust_lex_tests): Add test for long integer literal.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6ee8d05..f9b9e88 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2019-04-09  Ivan Begert  <ivanbegert@gmail.com>
+           Tom Tromey  <tromey@adacore.com>
+
+       PR rust/24414:
+       * rust-exp.y (rust_parser::lex_number): Use strtoulst.
+       (rust_lex_int_test): Change "value" to be LONGEST.
+       (rust_lex_tests): Add test for long integer literal.
+
 2019-04-09  Tom Tromey  <tromey@adacore.com>
 
        * remote.c (remote_target::remote_add_inferior): Change fake_pid_p

diff --git a/gdb/rust-exp.y b/gdb/rust-exp.y
index 2be2532..1593263 100644 (file)
--- a/gdb/rust-exp.y
+++ b/gdb/rust-exp.y
@@ -1610,7 +1610,7 @@ rust_parser::lex_number (YYSTYPE *lvalp)
            }
        }
 
-      value = strtoul (number.c_str () + offset, NULL, radix);
+      value = strtoulst (number.c_str () + offset, NULL, radix);
       if (implicit_i32 && value >= ((uint64_t) 1) << 31)
        type = get_type ("i64");
 
@@ -2603,7 +2603,8 @@ rust_lex_test_one (rust_parser *parser, const char *input, int expected)
 /* Test that INPUT lexes as the integer VALUE.  */
 
 static void
-rust_lex_int_test (rust_parser *parser, const char *input, int value, int kind)
+rust_lex_int_test (rust_parser *parser, const char *input,
+                  LONGEST value, int kind)
 {
   RUSTSTYPE result = rust_lex_test_one (parser, input, kind);
   SELF_CHECK (result.typed_val_int.val == value);
@@ -2781,6 +2782,7 @@ rust_lex_tests (void)
   rust_lex_int_test (&parser, "0x1_f", 0x1f, INTEGER);
   rust_lex_int_test (&parser, "0b1_101011__", 0x6b, INTEGER);
   rust_lex_int_test (&parser, "0o001177i64", 639, INTEGER);
+  rust_lex_int_test (&parser, "0x123456789u64", 0x123456789ull, INTEGER);
 
   rust_lex_test_trailing_dot (&parser);