# Copyright (C) 2016-2021 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 expression parsing and evaluation that requires Rust compiler.

load_lib rust-support.exp
if {[skip_rust_tests]} {
    continue
}

standard_testfile .rs
if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug rust}]} {
    return -1
}

set line [gdb_get_line_number "set breakpoint here"]
if {![runto ${srcfile}:$line]} {
    untested "could not run to breakpoint"
    return -1
}

gdb_test "print a" " = \\(\\)"
gdb_test "ptype a" " = \\(\\)"
gdb_test "print sizeof(a)" " = 0"

gdb_test "print b" " = \\\[\\\]"
gdb_test "ptype b" " = \\\[i32; 0\\\]"
gdb_test "print *(&b as *const \[i32; 0\])" " = \\\[\\\]"
gdb_test "print *(&b as *const \[i32; 0_0\])" " = \\\[\\\]"

gdb_test "print c" " = 99"
gdb_test "ptype c" " = i32"
gdb_test "print sizeof(c)" " = 4"

gdb_test "print c = 87" " = \\(\\)"
gdb_test "print c" " = 87" "print after assignment"
gdb_test "print c += 3" " = \\(\\)"
gdb_test "print c" " = 90" "print after plus assignment"
gdb_test "print c -= 90" " = \\(\\)"
gdb_test "print c" " = 0" "print after minus assignment"
gdb_test "print *&c" " = 0"
gdb_test "print *(&c as &i32)" " = 0"
gdb_test "print *(&c as *const i32)" " = 0"
gdb_test "print *(&c as *mut i32)" " = 0"
gdb_test "ptype &c as *mut i32" "\\*mut i32"

gdb_test "print/c f\[0\]" " = 104 'h'"

gdb_test "print j" " = simple::Unit"
gdb_test "ptype j" " = struct simple::Unit"
gdb_test "print j2" " = simple::Unit"
gdb_test "ptype j2" " = struct simple::Unit"
gdb_test "print simple::Unit" " = simple::Unit"
gdb_test "print simple::Unit{}" " = simple::Unit"
gdb_test "print simple::Unit{23}" "'}', '\.\.', or identifier expected"

gdb_test "print f" " = \"hi bob\""
gdb_test "print fslice" " = \"bob\""
gdb_test "print &f\[3..\]" " = \"bob\""

gdb_test "print g" " = \\(\\*mut \\\[u8; 6\\\]\\) $hex b\"hi bob\""
gdb_test "ptype g" " = \\*mut \\\[u8; 6\\\]"

gdb_test "print v" " = simple::Something::Three"
gdb_test_sequence "ptype v" "" {
    " = enum simple::Something \\{"
    "  One,"
    "  Two,"
    "  Three,"
    "\\}"
}

gdb_test "print w" " = \\\[1, 2, 3, 4\\\]"
gdb_test "ptype w" " = \\\[i32; 4\\\]"
gdb_test "print w\[2\]" " = 3"
gdb_test "print w\[2\] @ 2" " = \\\[3, 4\\\]"
gdb_test "print w_ptr\[2\]" " = 3"
gdb_test "print fromslice" " = 3"
gdb_test "print slice\[0\]" " = 3"
gdb_test "print (slice as &\[i32\])\[0\]" " = 3"

gdb_test "print slice as \[i32; 73.9\]" "integer expected"

gdb_test_sequence "ptype slice" "" {
    " = struct &\\\[i32\\\] \\{"
    "  data_ptr: \\*mut i32,"
    "  length: usize,"
    "\\}"
}
gdb_test_sequence "ptype &slice\[..\]" "" {
    " = struct &\\\[i32\\\] \\{"
    "  data_ptr: \\*mut i32,"
    "  length: usize,"
    "\\}"
}
gdb_test_sequence "ptype &b\[..\]" "" {
    " = struct &\\\[\\*gdb\\*\\\] \\{"
    "  data_ptr: \\*mut i32,"
    "  length: usize,"
    "\\}"
}

gdb_test "print x" " = \\(23, 25\\.5\\)"
gdb_test "ptype x" " = \\(i32, f64\\)"
gdb_test "print x as (i32,f64)" " = \\(23, 25\\.5\\)"

gdb_test "print y" " = simple::HiBob \\{field1: 7, field2: 8\\}"
gdb_test_sequence "ptype y" "" {
    " = struct simple::HiBob \\{"
    "  field1: i32,"
    "  field2: u64,"
    "\\}"
}
gdb_test "print y.field2" " = 8"

gdb_test "print z" " = simple::ByeBob \\(7, 8\\)"
gdb_test_sequence "ptype z" "" {
    " = struct simple::ByeBob \\("
    "  i32,"
    "  u64,"
    "\\)"
}
gdb_test "print z.1" " = 8"

# Some error checks.
gdb_test "print z.1_0" \
    "'_' not allowed in integers in anonymous field references"
gdb_test "print z.mut" "field name expected"

gdb_test "print univariant" " = simple::Univariant::Foo{a: 1}"
gdb_test "print univariant.a" " = 1"
gdb_test "print univariant_anon" " = simple::UnivariantAnon::Foo\\(1\\)"
gdb_test "print univariant_anon.0" " = 1"
gdb_test "print univariant_anon.sss" \
    "Attempting to access named field sss of tuple variant simple::UnivariantAnon::Foo, which has only anonymous fields"

gdb_test_sequence "ptype simple::Univariant" "" {
    "type = enum simple::Univariant \\{"
    "  Foo\\{a: u8\\},"
    "\\}"
}

gdb_test_sequence "ptype simple::UnivariantAnon" "" {
    "type = enum simple::UnivariantAnon \\{"
    "  Foo\\(u8\\),"
    "\\}"
}

gdb_test_sequence "ptype simple::ByeBob" "" {
    " = struct simple::ByeBob \\("
    "  i32,"
    "  u64,"
    "\\)"
}
gdb_test "print simple::ByeBob(0xff, 5)" \
    " = simple::ByeBob \\(255, 5\\)"
gdb_test "print simple::ByeBob\{field1: 0xff, field2:5\}" \
    "Struct expression applied to non-struct type"

gdb_test "print simple::HiBob(0xff, 5)" \
    "Type simple::HiBob is not a tuple struct"
gdb_test "print sizeof(simple::HiBob)" " = \[0-9\]+"
gdb_test "print simple::HiBob + 5" \
    "Attempt to use a type name as an expression"
gdb_test "print nosuchsymbol" \
    "No symbol 'nosuchsymbol' in current context"

gdb_test "print simple::HiBob{field1, field2}" \
    " = simple::HiBob \\{field1: 77, field2: 88\\}"

gdb_test "print simple::HiBob{field1: 99, .. y}" \
    " = simple::HiBob \\{field1: 99, field2: 8\\}"

gdb_test "print e" " = simple::MoreComplicated::Two\\(73\\)"
gdb_test "print e2" \
    " = simple::MoreComplicated::Four\\{this: true, is: 8, a: 109 'm', struct_: 100, variant: 10\\}"
gdb_test "print sizeof(e)" " = 24"
gdb_test_sequence "ptype e" "" {
    " = enum simple::MoreComplicated \\{"
    "  One,"
    "  Two\\(i32\\),"
    "  Three\\(simple::HiBob\\),"
    "  Four\\{this: bool, is: u8, a: char, struct_: u64, variant: u32\\},"
    "\\}"
}

# Test a parser error.
gdb_test "print sizeof e" "'\\(' expected"

gdb_test "print e.0" " = 73"
gdb_test "print e.1" \
    "Cannot access field 1 of variant simple::MoreComplicated::Two, there are only 1 fields"
gdb_test "print e.foo" \
    "Attempting to access named field foo of tuple variant simple::MoreComplicated::Two, which has only anonymous fields"

gdb_test "print e2.variant" " = 10"
gdb_test "print e2.notexist" \
    "Could not find field notexist of struct variant simple::MoreComplicated::Four"
gdb_test "print e2.0" \
    "Variant simple::MoreComplicated::Four is not a tuple variant"

set pass_pattern " = simple::SpaceSaver::Nothing"
set xfail_pattern " = simple::SpaceSaver::Thebox\\($decimal, 0x0\\)"
gdb_test_multiple "print k" "" {
    -re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
	pass $gdb_test_name
    }
    -re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
	xfail $gdb_test_name
    }
}
gdb_test "print l" " = simple::SpaceSaver::Thebox\\(9, $hex\\)"
gdb_test "print *l.1" " = 1729"

gdb_test "print diff2(3, 7)" " = -4"
gdb_test "print self::diff2(8, 9)" " = -1"
gdb_test "print ::diff2(23, -23)" " = 46"

gdb_test "ptype diff2" "fn \\(i32, i32\\) -> i32"
gdb_test "ptype empty" "fn \\(\\)"

gdb_test "print (diff2 as fn(i32, i32) -> i32)(19, -2)" " = 21"

gdb_test "print diff2(73, 74 75" "',' or '\\\)' expected"
gdb_test "print (diff2 as fn i32, i32) -> i32)(19, -2)" "'\\\(' expected"
gdb_test "print (diff2 as fn (i32, i32) i32)(19, -2)" "'->' expected"

gdb_test "print \"hello rust\"" " = \"hello rust.*\""
gdb_test "print \"hello" "Unexpected EOF in string"
gdb_test "print r##\"hello \" rust\"##" " = \"hello \\\\\" rust.*\""
gdb_test "print r\"hello" "Unexpected EOF in string"
gdb_test "print r###\"###hello\"" "Unexpected EOF in string"
gdb_test "print r###\"###hello\"##" "Unexpected EOF in string"
gdb_test "print r###\"hello###" "Unexpected EOF in string"

gdb_test "print 0..5" " = .*::ops::Range.* \\{start: 0, end: 5\\}"
gdb_test "print 0..=5" " = .*::ops::RangeInclusive.* \\{start: 0, end: 5\\}"
gdb_test "print ..5" " = .*::ops::RangeTo.* \\{end: 5\\}"
gdb_test "print ..=5" " = .*::ops::RangeToInclusive.* \\{end: 5\\}"
gdb_test "print 5.." " = .*::ops::RangeFrom.* \\{start: 5\\}"
gdb_test "print .." " = .*::ops::RangeFull"

set pass_pattern \
    " = core::option::Option<\[a-z\]+::string::String>::Some\\(\[a-z\]+::string::String .*"
set xfail_pattern \
    "( = <error reading variable>|That operation is not available on .*)"
gdb_test_multiple "print str_some" "" {
    -re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
	pass $gdb_test_name
    }
    -re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
	xfail $gdb_test_name
    }
}

set pass_pattern " = core::option::Option<\[a-z\]+::string::String>::None"
gdb_test_multiple "print str_none" "" {
    -re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
	pass $gdb_test_name
    }
    -re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
	xfail $gdb_test_name
    }
}

gdb_test "print int_some" " = core::option::Option<u8>::Some\\(1\\)"
gdb_test "print int_none" " = core::option::Option<u8>::None"
# The result expressions are a bit lax here, to handle the fact that
# the output varies between Rust versions.  Mostly we just want to
# check for the presence "Option", "Box", "u8", and either "Some" or
# "None".
gdb_test "print box_some" \
    " = core::option::Option<\[a-z:\]*Box<u8.*>>::Some\\(.*\\)"
gdb_test "print box_none" \
    " = core::option::Option<\[a-z:\]*Box<u8.*>>::None"

set pass_pattern \
    " = simple::NonZeroOptimized::Value\\(\[a-z\]+::string::String .*"
gdb_test_multiple "print custom_some" "" {
    -re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
	pass $gdb_test_name
    }
    -re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
	xfail $gdb_test_name
    }
}

set pass_pattern " = simple::NonZeroOptimized::Empty"
gdb_test_multiple "print custom_none" "" {
    -re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
	pass $gdb_test_name
    }
    -re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
	xfail $gdb_test_name
    }
}

gdb_test "print st" \
    " = simple::StringAtOffset {field1: \"hello\", field2: 1, field3: \"world\"}"

proc test_one_slice {svar length base range} {
    with_test_prefix $range {
	global hex

	set result " = &\\\[.*\\\] \\{data_ptr: $hex, length: $length\\}"

	gdb_test "print $svar" $result
	gdb_test "print &${base}\[${range}\]" $result
    }
}

test_one_slice slice 1 w 2..3
test_one_slice slice 1 w 2..=2
test_one_slice slice2 1 slice 0..1
test_one_slice slice2 1 slice 0..=0

test_one_slice all1 4 w ..
test_one_slice all2 1 slice ..

test_one_slice from1 3 w 1..
test_one_slice from2 0 slice 1..

test_one_slice to1 3 w ..3
test_one_slice to1 3 w ..=2
test_one_slice to2 1 slice ..1
test_one_slice to2 1 slice ..=0

gdb_test "print w\[2..3\]" "Can't take slice of array without '&'"


gdb_test_sequence "complete print y.f" "" \
    {"print y.field1" "print y.field2"}
gdb_test_sequence "complete print y." "" \
    {"print y.field1" "print y.field2"}

# Unimplemented, but we can at least test the parser productions.
gdb_test "print (1,2,3)" "Tuple expressions not supported yet"
gdb_test "print (1,)" "Tuple expressions not supported yet"
gdb_test "print (1)" " = 1"

# Test a syntax error in tuple expressions.
gdb_test "print (1,2,," "unexpected token"
gdb_test "print (1,2 8" "',' or '\\\)' expected"

gdb_test "print 23..97.0" "Range expression with different types"

gdb_test "print (*parametrized.next.val)" \
    " = simple::ParametrizedStruct<i32> {next: simple::ParametrizedEnum<\[a-z:\]*Box<simple::ParametrizedStruct<i32>.*>>::Empty, value: 1}"
gdb_test "print parametrized.next.val" \
    " = \\(\\*mut simple::ParametrizedStruct<i32>\\) $hex"
gdb_test "print parametrized" \
    " = simple::ParametrizedStruct<i32> \\{next: simple::ParametrizedEnum<\[a-z:\]*Box<simple::ParametrizedStruct<i32>.*>>::Val\\{val: $hex\\}, value: 0\\}"

gdb_test_sequence "ptype/o SimpleLayout" "" {
    "/\\* offset      |    size \\*/  type = struct simple::SimpleLayout {"
    "/\\*      0      |       2 \\*/    f1: u16,"
    "/\\*      2      |       2 \\*/    f2: u16,"
    ""
    "                               /\\* total size \\(bytes\\):    4 \\*/"
    "                             }"
}

gdb_test "print nonzero_offset" " = simple::EnumWithNonzeroOffset {a: core::option::Option<u8>::Some\\(1\\), b: core::option::Option<u8>::None}"

# PR rust/23626 - this used to crash.  Note that the results are
# fairly lax because most existing versions of Rust (those before the
# DW_TAG_variant patches) do not emit what gdb wants here; and there
# was little point fixing gdb to cope with these cases as the fixed
# compilers will be available soon
gdb_test "print empty_enum_value" \
    " = simple::EmptyEnum.*"
gdb_test "ptype empty_enum_value" "simple::EmptyEnum.*"
# Just make sure these don't crash, for the same reason.
gdb_test "print empty_enum_value.0" ""
gdb_test "print empty_enum_value.something" ""

load_lib gdb-python.exp
if {[skip_python_tests]} {
    continue
}

gdb_test "python print(gdb.lookup_type('simple::HiBob'))" "simple::HiBob"

gdb_test_no_output "python e = gdb.parse_and_eval('e')" \
    "get value of e for python"
gdb_test "python print(len(e.type.fields()))" "2"
gdb_test "python print(e.type.fields()\[0\].artificial)" "True"
gdb_test "python print(e.type.fields()\[1\].name)" "Two"

gdb_test "python print(e.type.dynamic)" "False"

# Before LLVM 8, the rust compiler would emit two types named
# "simple::MoreComplicated" -- the C-like "underlying" enum type and
# the Rust enum.  lookup_type seems to get the former, which isn't
# very useful.  With later versions of LLVM, this test works
# correctly.
set v [split [rust_llvm_version] .]
if {[lindex $v 0] >= 8} {
    gdb_test "python print(gdb.lookup_type('simple::MoreComplicated').dynamic)" \
	"True"
}