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# Copyright 1997-2020 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 is a test of gdb's follow-exec-mode.
#
# It first checks that exec events are supported by using a catchpoint,
# then tests multiple scenarios for follow-exec-mode using parameters
# that test:
# - each mode
# - different commands to execute past the exec
# - re-running both the original and new inferiors.
#
# Note that we can't single-step past an exec call. There has to
# be a breakpoint in order to stop after the exec, even if we use
# a single-step command to execute past the exec.
# Remote mode doesn't support the 'run' command, which is
# required for follow-exec-mode testing.
if { [target_info exists gdb_protocol]
&& [target_info gdb_protocol] == "remote" } {
continue
}
# Until "catch exec" is implemented on other targets...
#
if {![istarget "*-linux*"]} then {
continue
}
standard_testfile foll-exec-mode.c
set testfile2 "execd-prog"
set srcfile2 ${testfile2}.c
set binfile2 [standard_output_file ${testfile2}]
set compile_options debug
# build the first test case
if { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable $compile_options] != "" } {
untested "failed to compile"
return -1
}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $compile_options] != "" } {
untested "failed to compile"
return -1
}
# Test exec catchpoints to ensure exec events are supported.
#
proc do_catch_exec_test { } {
global testfile
global gdb_prompt
clean_restart $testfile
# Start the program running, and stop at main.
#
if ![runto_main] then {
fail "couldn't run ${testfile}"
return
}
# Verify that the system supports "catch exec".
gdb_test "catch exec" "Catchpoint \[0-9\]* \\(exec\\)" "insert first exec catchpoint"
set has_exec_catchpoints 0
gdb_test_multiple "continue" "continue to first exec catchpoint" {
-re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" {
unsupported "continue to first exec catchpoint"
}
-re ".*Catchpoint.*$gdb_prompt $" {
set has_exec_catchpoints 1
pass "continue to first exec catchpoint"
}
}
if {$has_exec_catchpoints == 0} {
unsupported "exec catchpoints"
return
}
}
# Test follow-exec-mode in the specified scenario.
# MODE determines whether follow-exec-mode is "same" or "new".
# CMD determines the command used to execute past the exec call.
# INFSWITCH is ignored for MODE == "same", and for "new" it is
# used to determine whether to switch to the original inferior
# before re-running.
proc do_follow_exec_mode_tests { mode cmd infswitch } {
global binfile srcfile srcfile2 testfile testfile2
global gdb_prompt
with_test_prefix "$mode,$cmd,$infswitch" {
clean_restart $testfile
# Start the program running, and stop at main.
#
if ![runto_main] then {
fail "couldn't run ${testfile}"
return
}
# Set the follow-exec mode.
#
gdb_test_no_output "set follow-exec-mode $mode"
# Run to the line of the exec call.
#
gdb_breakpoint [gdb_get_line_number "Set breakpoint here"]
gdb_continue_to_breakpoint "continue to line of exec call"
# Set up the output we expect to see after we execute past the exec.
#
set execd_line [gdb_get_line_number "after-exec" $srcfile2]
set expected_re ".*xecuting new program: .*${testfile2}.*Breakpoint .,.*${srcfile2}:${execd_line}.*$gdb_prompt $"
# Set a breakpoint after the exec call if we aren't single-stepping
# past it.
#
if {$cmd == "continue"} {
gdb_breakpoint "$execd_line"
}
# Execute past the exec call.
#
set test "$cmd past exec"
gdb_test_multiple $cmd $test {
-re "$expected_re" {
pass $test
}
}
# Set expected output, given the test parameters.
#
if {$mode == "same"} {
set expected_re "\\* 1.*process.*"
} else {
set expected_re " 1.*null.*$testfile.*\r\n\\* 2.*process.*$testfile2 .*"
}
# Check that the inferior list is correct:
# - one inferior for MODE == "same"
# - two inferiors for MODE == "new", current is execd program
#
gdb_test "info inferiors" $expected_re "Check inferior list"
set expected_inf ""
if {$mode == "same"} {
# One inferior, the execd program.
set expected_inf $testfile2
} elseif {$infswitch == "infswitch"} {
# Two inferiors, we have switched to the original program.
set expected_inf $testfile
gdb_test "inferior 1" "Switching to inferior 1.*$testfile.*" "switch inferiors"
} else {
# Two inferiors, run the execd program
set expected_inf $testfile2
}
# Now check that a 'run' command will run the correct inferior.
#
set test "use correct executable ($expected_inf) for run after follow exec"
gdb_run_cmd
gdb_test_multiple "" $test {
-re {Start it from the beginning\? \(y or n\) $} {
send_gdb "y\n"
exp_continue
}
-re "Starting program: .*$expected_inf.*Breakpoint .,.*\r\n$gdb_prompt $" {
pass $test
}
}
}
}
do_catch_exec_test
foreach cmd {"next" "continue"} {
foreach mode {"same" "new"} {
# Test basic follow-exec-mode.
do_follow_exec_mode_tests $mode $cmd "no_infswitch"
if {$mode == "new"} {
# Test that when we do 'run' we get the correct executable.
do_follow_exec_mode_tests $mode $cmd "infswitch"
}
}
}
return 0
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