binutils-gdb/gdb/testsuite/gdb.guile/scm-symbol.exp

# Copyright (C) 2010-2020 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/>.

# This file is part of the GDB testsuite.
# It tests the mechanism exposing symbols to Guile.

load_lib gdb-guile.exp

standard_testfile

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

# Skip all tests if Guile scripting is not enabled.
if { [skip_guile_tests] } { continue }

# These tests are done before we call gdb_guile_runto_main so we have to
# import the gdb module ourselves.
gdb_install_guile_utils
gdb_install_guile_module

# Test looking up a global symbol before we runto_main as this is the
# point where we don't have a current frame, and we don't want to
# require one.
gdb_scm_test_silent_cmd "guile (define main-func (lookup-global-symbol \"main\"))" \
    "lookup main"
gdb_test "guile (print (symbol-function? main-func))" \
    "= #t" "test (symbol-function? main)"
gdb_test "guile (print (lookup-global-symbol \"junk\"))" \
    "= #f" "test (lookup-global-symbol junk)"

gdb_test "guile (print (symbol-value main-func))" \
    "= {int \\(int, char \[*\]\[*\]\\)} $hex \\<main\\>" "print value of main"

set qq_line [gdb_get_line_number "line of qq"]
gdb_scm_test_silent_cmd "guile (define qq-var (lookup-global-symbol \"qq\"))" \
    "lookup qq"
gdb_test "guile (print (symbol-line qq-var))" \
    "= $qq_line" "print line number of qq"
gdb_test "guile (print (symbol-value qq-var))" \
    "= 72" "print value of qq"
gdb_test "guile (print (symbol-needs-frame? qq-var))" \
    "= #f" "print whether qq needs a frame"

if ![gdb_guile_runto_main] {
    return
}

# Test symbol eq? and equal?.
gdb_test "guile (print (eq? (lookup-global-symbol \"main\") (lookup-global-symbol \"main\")))" \
    "= #t"
gdb_test "guile (print (equal? (lookup-global-symbol \"main\") (lookup-global-symbol \"main\")))" \
    "= #t"

gdb_breakpoint [gdb_get_line_number "Block break here."]
gdb_continue_to_breakpoint "Block break here."
gdb_scm_test_silent_cmd "guile (define frame (selected-frame))" \
    "get frame at block break"
gdb_scm_test_silent_cmd "guile (define block (frame-block frame))" \
    "get block at block break"

# Test symbol-argument?.
gdb_scm_test_silent_cmd "guile (define arg (car (lookup-symbol \"arg\")))" \
    "get variable arg"
gdb_test "guile (print (symbol-variable? arg))" "= #f"
gdb_test "guile (print (symbol-constant? arg))" "= #f"
gdb_test "guile (print (symbol-argument? arg))" "= #t"
gdb_test "guile (print (symbol-function? arg))" "= #f"

# Test symbol-function?.
gdb_scm_test_silent_cmd "guile (define func (block-function block))" \
    "get block function"
gdb_test "guile (print (symbol-variable? func))" "= #f"
gdb_test "guile (print (symbol-constant? func))" "= #f"
gdb_test "guile (print (symbol-argument? func))" "= #f"
gdb_test "guile (print (symbol-function? func))" "= #t"

# Test attributes of func.
gdb_test "guile (print (symbol-name func))" "func"
gdb_test "guile (print (symbol-print-name func))" "func"
gdb_test "guile (print (symbol-linkage-name func))" "func"
gdb_test "guile (print (= (symbol-addr-class func) SYMBOL_LOC_BLOCK))" "= #t"

gdb_breakpoint [gdb_get_line_number "Break at end."]
gdb_continue_to_breakpoint "Break at end."
gdb_scm_test_silent_cmd "guile (define frame (selected-frame))" \
    "get frame at end"

# Test symbol-variable?.
gdb_scm_test_silent_cmd "guile (define a (car (lookup-symbol \"a\")))" \
    "get variable a"
gdb_test "guile (print (symbol-variable? a))" "= #t"
gdb_test "guile (print (symbol-constant? a))" "= #f"
gdb_test "guile (print (symbol-argument? a))" "= #f"
gdb_test "guile (print (symbol-function? a))" "= #f"

# Test attributes of a.
gdb_test "guile (print (= (symbol-addr-class a) SYMBOL_LOC_COMPUTED))" "= #t"

gdb_test "guile (print (symbol-value a))" \
    "ERROR: Symbol requires a frame to compute its value.*"\
    "try to print value of a without a frame"
gdb_test "guile (print (symbol-value a #:frame frame))" \
    "= 0" "print value of a"
gdb_test "guile (print (symbol-needs-frame? a))" \
    "= #t" "print whether a needs a frame"

# Test symbol-constant?.
gdb_scm_test_silent_cmd "guile (define t (car (lookup-symbol \"one\")))" \
    "get constant t"
gdb_test "guile (print (symbol-variable? t))" "= #f"
gdb_test "guile (print (symbol-constant? t))" "= #t"
gdb_test "guile (print (symbol-argument? t))" "= #f"
gdb_test "guile (print (symbol-function? t))" "= #f"

# Test attributes of t.
gdb_test "guile (print (= (symbol-addr-class t) SYMBOL_LOC_CONST))" "= #t"

# Test type attribute.
gdb_test "guile (print (symbol-type t))" "= enum tag"

# Test symtab attribute.
gdb_test "guile (print (symbol-symtab t))" "= #<gdb:symtab .*gdb.guile/scm-symbol.c>"

# C++ tests
# Recompile binary.
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}-cxx" executable "debug c++"] != "" } {
    untested "failed to compile in C++ mode"
    return -1
}

# Start with a fresh gdb.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}-cxx

if ![gdb_guile_runto_main] {
    return
}

gdb_breakpoint [gdb_get_line_number "Break in class."]
gdb_continue_to_breakpoint "Break in class."

gdb_scm_test_silent_cmd "guile (define cplusframe (selected-frame))" \
    "get frame at class"
gdb_scm_test_silent_cmd "guile (define cplusfunc (block-function (frame-block cplusframe)))" \
    "get function at class"

gdb_test "guile (print (symbol-variable? cplusfunc))" "= #f"
gdb_test "guile (print (symbol-constant? cplusfunc))" "= #f"
gdb_test "guile (print (symbol-argument? cplusfunc))" "= #f"
gdb_test "guile (print (symbol-function? cplusfunc))" "= #t"

gdb_test "guile (print (symbol-name cplusfunc))" \
    "= SimpleClass::valueofi().*" "test method.name"
gdb_test "guile (print (symbol-print-name cplusfunc))" \
    "= SimpleClass::valueofi().*" "test method.print_name"
# FIXME: GDB is broken here and we're verifying broken behaviour.
# (linkage-name should be the mangled name)
gdb_test "guile (print (symbol-linkage-name cplusfunc))" \
    "SimpleClass::valueofi().*" "test method.linkage_name"
gdb_test "guile (print (= (symbol-addr-class cplusfunc) SYMBOL_LOC_BLOCK))" "= #t"

# Test is_valid when the objfile is unloaded.  This must be the last
# test as it unloads the object file in GDB.
# Start with a fresh gdb.
clean_restart ${testfile}
if ![gdb_guile_runto_main] {
    return
}

gdb_breakpoint [gdb_get_line_number "Break at end."]
gdb_continue_to_breakpoint "Break at end."
gdb_scm_test_silent_cmd "guile (define a (car (lookup-symbol \"a\")))" \
    "get variable a for unload"
gdb_test "guile (print (symbol-valid? a))" \
    "= #t" "test symbol validity pre-unload"
delete_breakpoints
gdb_unload
gdb_test "guile (print (symbol-valid? a))" \
    "= #f" "test symbol validity post-unload"
gdb_test_no_output "guile (set! a #f) (gc)" "test symbol destructor"