binutils-gdb/gdb/testsuite/gdb.base/jit-elf.exp

# Copyright 2011-2020 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/>.

if {[skip_shlib_tests]} {
    untested "skipping shared library tests"
    return -1
}

if {[get_compiler_info]} {
    untested "could not get compiler info"
    return 1
}

load_lib jit-elf-helpers.exp

# Increase this to see more detail.
set test_verbose 0

# The main code that loads and registers JIT objects.
set main_basename "jit-elf-main"
set main_srcfile ${srcdir}/${subdir}/${main_basename}.c
set main_binfile [standard_output_file ${main_basename}]

# The shared library that gets loaded as JIT objects.
set jit_solib_basename jit-elf-solib
set jit_solib_srcfile ${srcdir}/${subdir}/${jit_solib_basename}.c

# Detach, restart GDB, and re-attach to the program.
proc clean_reattach {} {
    global decimal gdb_prompt
    global main_binfile main_srcfile

    # Get PID of test program.
    set testpid -1
    set test "get inferior process ID"
    gdb_test_multiple "p mypid" $test {
	-re ".* = ($decimal).*$gdb_prompt $" {
	    set testpid $expect_out(1,string)
	    pass $test
	}
    }

    gdb_test_no_output "set var wait_for_gdb = 1"
    gdb_test "detach" "Detaching from .*"

    clean_restart ${main_binfile}

    set test "attach"
    gdb_test_multiple "attach $testpid" "$test" {
	-re "Attaching to program.*.*main.*at .*$main_srcfile:.*$gdb_prompt $" {
	    pass "$test"
	}
    }

    gdb_test_no_output "set var wait_for_gdb = 0"
}

# Continue to LOCATION in the program.  If REATTACH, detach and
# re-attach to the program from scratch.
proc continue_to_test_location {location reattach} {
    global main_srcfile

    gdb_breakpoint [gdb_get_line_number $location $main_srcfile]
    gdb_continue_to_breakpoint $location
    if {$reattach} {
	with_test_prefix "$location" {
	    clean_reattach
	}
    }
}

proc one_jit_test {jit_solibs_target match_str reattach} {
    set count [llength $jit_solibs_target]

    with_test_prefix "one_jit_test-$count" {
	global test_verbose
	global main_binfile main_srcfile

	clean_restart ${main_binfile}

	# This is just to help debugging when things fail
	if {$test_verbose > 0} {
	    gdb_test "set debug jit 1"
	}

	if { ![runto_main] } {
	    fail "can't run to main"
	    return
	}

	# Poke desired values directly into inferior instead of using "set args"
	# because "set args" does not work under gdbserver.
	incr count
	gdb_test_no_output "set var argc=$count" "forging argc"
	gdb_test_no_output "set var argv=fake_argv" "forging argv"
	for {set i 1} {$i < $count} {incr i} {
	    set jit_solib_target [lindex $jit_solibs_target [expr $i-1]]
	    gdb_test_no_output "set var argv\[$i\]=\"${jit_solib_target}\"" \
		"forging argv\[$i\]"
	}

	gdb_breakpoint [gdb_get_line_number "break here 0" $main_srcfile]
	gdb_continue_to_breakpoint "break here 0"


	continue_to_test_location "break here 1" $reattach

	gdb_test "info function ^jit_function" "$match_str"

	# This is just to help debugging when things fail
	if {$test_verbose > 0} {
	    gdb_test "maintenance print objfiles"
	    gdb_test "maintenance info break"
	}

	continue_to_test_location "break here 2" $reattach

	# All jit librares must have been unregistered
	gdb_test "info function jit_function" \
	    "All functions matching regular expression \"jit_function\":"
    }
}

# Compile two shared libraries to use as JIT objects.
set jit_solibs_target [compile_and_download_n_jit_so \
		      $jit_solib_basename $jit_solib_srcfile 2]
if { $jit_solibs_target == -1 } {
    return
}

# Compile the main code (which loads the JIT objects).
if { [compile_jit_main ${main_srcfile} ${main_binfile} {}] == 0 } {
    one_jit_test [lindex $jit_solibs_target 0] "${hex}  jit_function_0001" 0
    one_jit_test $jit_solibs_target "${hex}  jit_function_0001\[\r\n\]+${hex}  jit_function_0002" 0
}

# Test attaching to an inferior with some JIT libraries already
# registered.  We reuse the normal test, and detach/reattach at
# specific interesting points.
if {[can_spawn_for_attach]} {
    if { [compile_jit_main ${main_srcfile} "${main_binfile}-attach" \
	    {additional_flags=-DATTACH=1}] == 0 } {
	with_test_prefix attach {
	    one_jit_test $jit_solibs_target "${hex}  jit_function_0001\[\r\n\]+${hex}  jit_function_0002" 1
	}
    }
}

if { [compile_jit_main ${main_srcfile} "${main_binfile}-pie" \
	  {additional_flags=-fPIE ldflags=-pie}] == 0 } {
    with_test_prefix PIE {
	one_jit_test [lindex $jit_solibs_target 0] "${hex}  jit_function_0001" 0
    }
}