gdb/testsuite/gdb.cp/local-static.exp

# Copyright 2017-2021 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/>.

# Tests for function local static variables, both C and C++.

# This file is part of the gdb testsuite.

standard_testfile .c

# A few expected errors.
set syntax_re "A syntax error in expression, near.*"
set cannot_resolve_re "Cannot resolve method S::method to any overloaded instance"

# Build an "Cannot resolve method ..." expected error string for
# method METH.
#
proc cannot_resolve {meth} {
    return "Cannot resolve method $meth to any overloaded instance"
}

# A list of scopes that have the static variables that we want to
# print.  Each entry has, in order, the scope/function name, and the
# prefix used by the static variables.  The prefix exists both to make
# it easier to debug the test if something goes wrong, and, to make
# sure that printing the static local of one method overload doesn't
# find the variables of the wrong overload.
#
# While at it, we also try printing each scope without the static
# local, to check that the parse copes with cv overloads without
# quoting.  That's what the third and forth columns are for.  Note
# that printing "func()" is different from "func(void)".  The former
# is an inferior function call, while the latter is a reference to the
# function.

     #SCOPE				#PREFIX         #PRINT-SCOPE-QUOTED
							#PRINT-SCOPE-UNQUOTED (opt)
set cxx_scopes_list {
    {"S::method()"			"S_M"		{= \\{void \\(S \\* const\\)\\} $hex <S::method\\(\\)>}
							{[cannot_resolve "S::method"]}}

    {"S::method() const"		"S_M_C"		{= \\{void \\(const S \\* const\\)\\} $hex <S::method\\(\\) const>}
							$syntax_re}

    {"S::method() volatile"		"S_M_V"		{= \\{void \\(volatile S \\* const\\)\\} $hex <S::method\\(\\) volatile>}
							$syntax_re}

    {"S::method() const volatile"	"S_M_CV"	{= \\{void \\(const volatile S \\* const\\)\\} $hex <S::method\\(\\) const volatile>}
							$syntax_re}

    {"S::method() volatile const"	"S_M_CV"	{= \\{void \\(const volatile S \\* const\\)\\} $hex <S::method\\(\\) const volatile>}
							$syntax_re}

    {"S::method(void)"			"S_M"		{= \\{void \\(S \\* const\\)\\} $hex <S::method\\(\\)>}}
    {"S::method(void) const"		"S_M_C"		{= \\{void \\(const S \\* const\\)\\} $hex <S::method\\(\\) const>}}
    {"S::method(void) volatile"		"S_M_V"		{= \\{void \\(volatile S \\* const\\)\\} $hex <S::method\\(\\) volatile>}}
    {"S::method(void) const volatile"	"S_M_CV"	{= \\{void \\(const volatile S \\* const\\)\\} $hex <S::method\\(\\) const volatile>}}
    {"S::method(void) volatile const"	"S_M_CV"	{= \\{void \\(const volatile S \\* const\\)\\} $hex <S::method\\(\\) const volatile>}}

    {"S::static_method()"		"S_SM"		{= \\{void \\(void\\)\\} $hex <S::static_method\\(\\)>}
							"void"}

    {"S::static_method(void)"		"S_SM"		{= \\{void \\(void\\)\\} $hex <S::static_method\\(\\)>}}

    {"S::inline_method()"		"S_IM"		{= \\{void \\(S \\* const\\)\\} $hex <S::inline_method\\(\\)>}
							{[cannot_resolve "S::inline_method"]}}

    {"S::inline_method(void)"		"S_IM"		{= \\{void \\(S \\* const\\)\\} $hex <S::inline_method\\(\\)>}}

    {"S::static_inline_method()"	"S_SIM"		{= \\{void \\(void\\)\\} $hex <S::static_inline_method\\(\\)>}
							"void"}

    {"S::static_inline_method(void)"	"S_SIM"		{= \\{void \\(void\\)\\} $hex <S::static_inline_method\\(\\)>}}

    {"S2<int>::method()"		"S2_M"		{= \\{void \\(S2<int> \\* const\\)\\} $hex <S2<int>::method\\(\\)>}
							{[cannot_resolve "S2<int>::method"]}}

    {"S2<int>::static_method()"		"S2_SM"		{= \\{void \\(void\\)\\} $hex <S2<int>::static_method\\(\\)>}
							"void"}

    {"S2<int>::inline_method()"		"S2_IM"		{= \\{void \\(S2<int> \\* const\\)\\} $hex <S2<int>::inline_method\\(\\)>}
							{[cannot_resolve "S2<int>::inline_method"]}}

    {"S2<int>::static_inline_method()"	"S2_SIM"	{= \\{void \\(void\\)\\} $hex <S2<int>::static_inline_method\\(\\)>}
							"void"}

    {"free_func"			"FF"		{= \\{void \\(void\\)\\} $hex <free_func\\(\\)>}}

    {"free_func()"			"FF"		{= \\{void \\(void\\)\\} $hex <free_func\\(\\)>}
							"void"}

    {"free_func(void)"			"FF"		{= \\{void \\(void\\)\\} $hex <free_func\\(\\)>}}

    {"free_inline_func()"		"FIF"		{= \\{void \\(void\\)\\} $hex <free_inline_func\\(\\)>}
							"void"}

    {"free_inline_func(void)"		"FIF"		{= \\{void \\(void\\)\\} $hex <free_inline_func\\(\\)>}}
}

set c_scopes_list {
    {"free_func"			"FF"		{= \\{void \\(void\\)\\} $hex <free_func>}}
    {"free_inline_func"			"FIF"		{= \\{void \\(void\\)\\} $hex <free_inline_func>}}
}

# A list of all the static varibles defined in each scope.  The first
# column is the name of the variable, without the prefix, and the
# second column is a regex matching what printing the variable should
# output.

     #VAR		#PRINT
set vars_list {
    {"s_var_int"	" = 4"}
    {"s_var_float"	" = 3.14.*"}
    {"s_var_aggregate"	" = \\{i1 = 1, i2 = 2, i3 = 3\\}"}
}

proc do_test {lang} {
    global c_scopes_list
    global cxx_scopes_list
    global vars_list
    global srcfile testfile
    global gdb_prompt

    set options {debug}

    if {$lang == "c++"} {
	if { [skip_cplus_tests] } {
	    return
	}
	lappend options $lang
	set src ${srcfile}c
    } else {
	set src ${srcfile}
    }

    if {[prepare_for_testing "failed to prepare" $testfile-$lang \
	     [list $src] $options]} {
	return -1
    }

    if ![runto_main] then {
	return
    }

    gdb_test "show language" " currently [string_to_regexp $lang]\"\\."

    if {$lang == "c"} {
	set scopes_list $c_scopes_list
    } else {
	set scopes_list $cxx_scopes_list
    }

    # Print each scope/function using these syntaxes:
    #
    #  "(gdb) p 'S::method() const'"    # quoted
    #  "(gdb) p S::method() const"      # unquoted
    #
    foreach scope_line $scopes_list  {
	set scope [lindex $scope_line 0]

	set print_quoted_re [lindex $scope_line 2]
	set print_quoted_re [uplevel 1 "subst -nobackslashes -nocommands \"$print_quoted_re\""]

	set print_unquoted_re [lindex $scope_line 3]
	set print_unquoted_re [uplevel 1 "subst -nobackslashes -nocommands \"$print_unquoted_re\""]

	gdb_test "print '${scope}'" $print_quoted_re

	if {$print_unquoted_re != ""} {
	    gdb_test "print ${scope}" $print_unquoted_re
	} else {
	    gdb_test "print ${scope}" $print_quoted_re
	}
    }

    # Print each variable using these syntaxes:
    #
    #  'func()'::var
    #  func()::var
    #  'func()::var'
    #
    # In C++, the latter case makes sure that symbol lookup finds the
    # debug symbol instead of the minimal symbol with that exact same
    # name.

    foreach scope_line $scopes_list  {
	set scope [lindex $scope_line 0]
	set var_prefix [lindex $scope_line 1]
	foreach var_line $vars_list {
	    set var [lindex $var_line 0]
	    set print_re [lindex $var_line 1]

	    # The gcc PR debug/55541 has the effect that local statics are
	    # wrapped in a DW_TAG_lexical_block, making them unaddressable from
	    # outside the function.  XFAIL the relevant tests.
	    set test "print '${scope}'::${var_prefix}_${var}"
	    set xfail_pattern "No symbol \".*\" in specified context."
	    gdb_test_multiple $test $test {
		-re "\[\r\n\]*(?:$print_re)\[\r\n\]+$gdb_prompt $" {
		    pass $test
		}
		-re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
		    xfail $test
		}
	    }
	    set test "print ${scope}::${var_prefix}_${var}"
	    gdb_test_multiple $test $test {
		-re "\[\r\n\]*(?:$print_re)\[\r\n\]+$gdb_prompt $" {
		    pass $test
		}
		-re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
		    xfail $test
		}
	    }

	    set sym "${scope}::${var_prefix}_${var}"
	    if {$lang == "c++"} {
		set test "print '${sym}'"
		set xfail_pattern "No symbol .* in current context."
		set xfail_pattern2 "has unknown type; cast it to its declared type"
		gdb_test_multiple $test $test {
		    -re "\[\r\n\]*(?:$print_re)\[\r\n\]+$gdb_prompt $" {
			pass $test
		    }
		    -re "\[\r\n\]*(?:$xfail_pattern)\[\r\n\]+$gdb_prompt $" {
			xfail $test
		    }
		    -re "\[\r\n\]*(?:$xfail_pattern2)\[\r\n\]+$gdb_prompt $" {
			xfail $test
		    }
		}
	    } else {
		gdb_test "print '${sym}'" "No symbol \"$sym\" in current context\\."
	    }
	}
    }

    # Now run to each function, and print its variables using the
    # localy-visible name.
    foreach scope_line $scopes_list {
	set scope [lindex $scope_line 0]
	set var_prefix [lindex $scope_line 1]

	with_test_prefix "$scope" {
	    delete_breakpoints
	    gdb_breakpoint "$scope"
	    gdb_continue_to_breakpoint "$scope"

	    foreach var_line $vars_list {
		set var [lindex $var_line 0]
		set print_re [lindex $var_line 1]

		gdb_test "print ${var_prefix}_${var}" $print_re
	    }
	}
    }
}

foreach lang {"c" "c++"} {
    with_test_prefix $lang {
	do_test $lang
    }
}