# Copyright 1992-2021 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/>.

# This file was written by Fred Fish. (fnf@cygnus.com)


# Create and source the file that provides information about the compiler
# used to compile the test case.
if [get_compiler_info] {
    return -1
}

standard_testfile opaque0.c opaque1.c

if {[prepare_for_testing "failed to prepare" $testfile \
	 [list $srcfile $srcfile2] debug]} {
    return -1
}

#
# Test basic opaque structure handling (statically).
# The ordering of the tests is significant.  We first try the things that
# might fail if gdb fails to connect the uses of opaque structures to
# the actual opaque structure definition.

# When we start up, gdb sets the file containing main() as the current
# source file.  The actual structure foo is defined in a different file.
# A pointer (foop) to an instance of the opaque struct is defined in the same
# source file as main().  Ensure that gdb correctly "connected" the definition
# in the other file with the pointer to the opaque struct in the file containing
# "foop".

# Define a procedure to set up an xfail for all targets that do not support
# this sort of cross reference.
# Any target gcc that has a DBX_NO_XREFS definition in its config file will
# not support it (FIXME: Is this still true; I suspect maybe not).

# Native alpha ecoff doesn't support it either.
# I don't think this type of cross reference works for any COFF target
# either.

proc setup_xfail_on_opaque_pointer {} {
	global gcc_compiled

	setup_xfail "vax-*-*" "i*86-sequent-bsd*"
       if {!$gcc_compiled} then {
               setup_xfail "alpha-*-*"
       }
}

# This seems easier than trying to track different versions of xlc; I'm
# not sure there is much rhyme or reason regarding which tests it fails
# and which ones it passes.
if {[istarget "rs6000-*-aix*"] && !$gcc_compiled} then {
    warning "xfails in opaque.exp may not be set up correctly for xlc"
}

setup_xfail_on_opaque_pointer
gdb_test "whatis foop" \
    "type = struct foo \[*\]+" \
    "whatis on opaque struct pointer (statically)"


# Ensure that we know the form of the structure that foop points to.

setup_xfail_on_opaque_pointer
if {!$gcc_compiled} then { setup_xfail "rs6000-*-*" }
gdb_test "ptype foop" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\} \[*\]+" \
    "ptype on opaque struct pointer (statically)"


# An instance of the opaque structure (afoo) is defined in a different file.
# Ensure that we can locate afoo and the structure definition.

gdb_test "whatis afoo" \
    "type = struct foo" \
    "whatis on opaque struct instance (statically)"


# Ensure that we know the form of "afoo".

gdb_test "ptype afoo" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\}" \
    "ptype on opaque struct instance (statically)"


# Ensure that we know what a struct foo looks like.

gdb_test "ptype struct foo" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\}" \
    "ptype on opaque struct tagname (statically)"


#
# Done with static tests, now test dynamic opaque structure handling.
# We reload the symbol table so we forget about anything we might
# have learned during the static tests.
#

gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

# Run to main, where struct foo is incomplete.
if ![runto_main] {
    perror "cannot run to breakpoint at main"
}


# The current source file is now the one containing main().  The structure foo
# is defined in a different file, but we have a pointer to an instance of
# the opaque structure in the current file.  Ensure we know it's type.

setup_xfail_on_opaque_pointer
gdb_test "whatis foop" \
    "type = struct foo \[*\]+" \
    "whatis on opaque struct pointer (dynamically)"


# Ensure that we know the form of the thing foop points to.

setup_xfail_on_opaque_pointer
if {!$gcc_compiled} then { setup_xfail "rs6000-*-*" }
gdb_test "ptype foop" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\} \[*\]+" \
    "ptype on opaque struct pointer (dynamically) 1"

gdb_test "whatis afoo" \
    "type = struct foo" \
    "whatis on opaque struct instance (dynamically) 1"


# Ensure that we know the form of afoo, an instance of a struct foo.

gdb_test "ptype afoo" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\}" \
    "ptype on opaque struct instance (dynamically) 1"


# Ensure that we know the form of an explicit struct foo.

if {!$gcc_compiled} then { setup_xfail "rs6000-*-*" }
gdb_test "ptype struct foo" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\}" \
    "ptype on opaque struct tagname (dynamically) 1"


# Now reload the symbols again so we forget about anything we might
# have learned reading the symbols during the previous tests.

gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

# Run to getfoo, where struct foo is complete.
if ![runto getfoo] {
    perror "cannot run to breakpoint at getfoo"
}


# Ensure that we know what foop is.

setup_xfail_on_opaque_pointer
gdb_test "whatis foop" \
    "type = struct foo \[*\]+" \
    "whatis on opaque struct pointer (dynamically) 1"


# Ensure that we know the form of the thing foop points to.

setup_xfail_on_opaque_pointer
gdb_test "ptype foop" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\} \[*\]+" \
    "ptype on opaque struct pointer (dynamically) 2"

gdb_test "whatis afoo" \
    "type = struct foo" \
    "whatis on opaque struct instance (dynamically) 2"


# Ensure that we know the form of afoo, an instance of a struct foo.

gdb_test "ptype afoo" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\}" \
    "ptype on opaque struct instance (dynamically) 2"


# Ensure that we know the form of an explicit struct foo.

gdb_test "ptype struct foo" \
    "type = struct foo \{\[\r\n\]+    int a;\[\r\n\]+    int b;\[\r\n\]+\}" \
    "ptype on opaque struct tagname (dynamically) 2"