gdb/testsuite/gdb.rust/expr.exp

# Copyright (C) 2016-2025 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Test basic expression parsing and evaluation, without requiring a
# Rust compiler.  This serves as a smoke test.

load_lib "rust-support.exp"
require allow_rust_tests

gdb_start

gdb_test_no_output "set var \$something = 27"

if {![set_lang_rust]} {
    warning "Rust expression tests suppressed."
    return
}

gdb_test "print 9__97" " = 997"
gdb_test "print -5" " = -5"
gdb_test "print +5" " = 5"
gdb_test "print +-+-5" " = 5"
gdb_test "print 3_2i32" " = 32"
gdb_test "print 32i64" " = 32"
gdb_test "print 8u8" " = 8"
gdb_test "print 0x1f" " = 31"
gdb_test "print 0o07" " = 7"
gdb_test "print 0o70" " = 56"
gdb_test "print 0b1_111" " = 15"
gdb_test "print 32usize" " = 32"
gdb_test "print 0x_4" " = 4"

gdb_test "print 'z'" " = 122 'z'"
gdb_test "print '\\t'" " = 9 '\\\\t'"
gdb_test "print '\\n'" " = 10 '\\\\n'"
gdb_test "print '\\r'" " = 13 '\\\\r'"
gdb_test "print '\\\\'" " = 92 '\\\\\\\\'"
gdb_test "print '\\0'" " = 0 '\\\\0'"
gdb_test "print '\\''" " = 39 '\\\\''"
gdb_test "print '\\\"'" " = 34 '\"'"
gdb_test "print '\\xff'" " = 255 '\\\\xff'"
gdb_test "print '\\xFF'" " = 255 '\\\\xff'"
gdb_test "print '\\u\{F0eF\}'" " = 61679 '\\\\u\\{00f0ef\\}'"

gdb_test "print b'z'" " = 122"
gdb_test "print b'\\xfe'" " = 254"
gdb_test "print b'\\t'" " = 9"
gdb_test "print b'\\n'" " = 10"
gdb_test "print b'\\r'" " = 13"
gdb_test "print b'\\\\'" " = 92"
gdb_test "print b'\\0'" " = 0"
gdb_test "print b'\\''" " = 39"
gdb_test "print b'\\\"'" " = 34"
gdb_test "print b'\\xff'" " = 255"

gdb_test "print 23.5" " = 23.5"
gdb_test "print 23.5e1" " = 235"
gdb_test "print 2e4" " = 20000"
gdb_test "print 2_E+4_f64" " = 20000"
gdb_test "print 5e-1" " = 0.5"
gdb_test "print 5e-1f32" " = 0.5"

gdb_test "print false" " = false"
gdb_test "print true" " = true"

gdb_test "print 1+2" " = 3"
gdb_test "print 1i32 + 2i32" " = 3"
gdb_test "print 2.0 - 1.0" " = 1"
gdb_test "print !false" " = true"
gdb_test "print !true" " = false"
gdb_test "print !0u8" " = 255"
gdb_test "print 7 * 7" " = 49"
gdb_test "print 7usize * 7usize" " = 49"
gdb_test "print 42 / 7" " = 6"
gdb_test "print 42 % 7" " = 0"
gdb_test "print 1.0 / 2.0" " = 0.5"
gdb_test "print 1 < 2" " = true"
gdb_test "print !(1 < 2)" " = false"
gdb_test "print 3 + 4 * 7" " = 31"
gdb_test "print 1 > 2" " = false"
gdb_test "print 1 | 2" " = 3"
gdb_test "print 1 & 2" " = 0"
gdb_test "print 3 & 2" " = 2"
gdb_test "print 3 ^ 2" " = 1"
gdb_test "print (1 < 0) || true" " = true"
gdb_test "print (1 > 0) && false" " = false"
gdb_test "print 'z' == 'z'" " = true"
gdb_test "print '\\u{1016f}' != 'q'" " = true"
gdb_test "print 32 <= 32" " = true"
gdb_test "print 32 >= 32" " = true"
gdb_test "print 1 << 5" " = 32"
gdb_test "print 32usize >> 5" " = 1"
gdb_test "ptype 32i32 as f64" "type = f64"

gdb_test "ptype 0xf9f9f9f90000" "type = i64"

gdb_test "print ()" " = \\(\\)"

gdb_test "print \[1,2,3,4\]" " = \\\[1, 2, 3, 4\\\]"
gdb_test "ptype \[1,2,3,4\]" "type = \\\[i32; 4\\\]"
gdb_test "print \[mut 1,2,3,4\]" " = \\\[1, 2, 3, 4\\\]"
gdb_test "print \[1,2 3" "',' or ']' expected"
gdb_test "print \[1 2" "',', ';', or ']' expected"
gdb_test "print \[23\]" " = \\\[23\\\]"

gdb_test "print \[0;0\]" " = \\\[\\\]"
gdb_test "print \[1;0\]" " = \\\[\\\]"
gdb_test "print \[0;1\]" " = \\\[0\\\]"

gdb_test "print b\"hi rust\"" " = b\"hi rust\""
# This isn't rusty syntax yet, but that's another bug -- this is just
# testing that byte escapes work properly.
gdb_test "print b\"\\xddhi bob\"" " = b\"\\\\335hi bob\""
gdb_test "print b\"has\\0nul\"" " = b\"has\\\\000nul\""

gdb_test "print br##\"hi\"##" " = b\"hi\""
gdb_test "print br##\"hi" "Unexpected EOF in string"
gdb_test "print br##\"hi\"" "Unexpected EOF in string"
gdb_test "print br##\"hi\"#" "Unexpected EOF in string"

# Test that convenience variables and functions work with the Rust
# parser.
gdb_test "print \$something" " = 27"
gdb_test "print \$_isvoid(\$nosuchvariable)" " = 1"
gdb_test "print \$_isvoid(\$something)" " = 0"

gdb_test "print \[23usize; 4\]" " = \\\[23, 23, 23, 23\\\]"
gdb_test "ptype \[23usize; 4\]" " = \\\[usize; 4\\\]"
gdb_test "print \[mut 23usize; 4\]" " = \\\[23, 23, 23, 23\\\]"

# Test lexer corner cases.
gdb_test "print 0x0 as *mut ()" " = \\\(\\*mut \\\(\\\)\\\) 0x0"
gdb_test "print 0x0 as fn(i64) -> ()" " = \\\(\\*mut fn \\\(i64\\\) -> \\\(\\\)\\\) 0x0"

# The lexer doesn't treat this as a failure, but rather as two tokens,
# and we error out while trying to look up 'r'.  This is fine, though
# -- what's important is that it isn't accepted.
gdb_test "print r#" "No symbol 'r' in current context"

gdb_test "printf \"%d %d\\n\", 23+1, 23-1" "24 22"

gdb_test "print 5," "Syntax error near ','"

# Check expression debug works for strings.
gdb_test "with debug expression 1 -- print \"foo\"" \
    [multi_line \
	 "Operation: OP_AGGREGATE" \
	 " Type: &str" \
	 " nullptr" \
	 " Vector:" \
	 "  String: data_ptr" \
	 "  Operation: UNOP_ADDR" \
	 "   Operation: OP_STRING" \
	 "    String: foo" \
	 "  String: length" \
	 "  Operation: OP_LONG" \
	 "   Type: usize" \
	 "   Constant: 3" \
	 "Operation: OP_LONG" \
	 " Type: i32" \
	 " Constant: 0" \
	 "evaluation of this expression requires the target program to be active"] \
    "print a string with expression debug turned on"

# PR rust/31082 - truncating to a pointer would fail.  Depending on
# the default host architecture, this may or may not print a warning.
gdb_test "print (0xffffffd00000009a as *mut u64)" \
    "(warning: value truncated\[\r\n\]+)?.* = \\(\\*mut u64\\) $hex"