gdb/testsuite/gdb.base/reset-catchpoint-cond.exp

# Copyright 2024 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/>.

# Test that the condition for a catchpoint is correctly reset after
# shared libraries are unloaded, as happens when an inferior is
# restarted.
#
# If this is not done then, when the catchpoint is hit on the second
# run, we'll evaluate the parsed expression from the first run, which
# might include references to types owned by the now deleted objfile
# (for the shared library loaded in the first run).
#
# This scripts tests a number of different catchpoint types.  Inside
# GDB these are all sub-classes of the 'catchpoint' type, which is
# where the fix for the above issue resides, so all catchpoint types
# should work correctly.

standard_testfile .c -lib.c

set libfile $binfile-lib.so

set pyfile [gdb_remote_download host ${srcdir}/${subdir}/${testfile}.py]

if {[build_executable "build shared library" $libfile $srcfile2 \
	 {debug shlib}] == -1} {
    return
}

# Depending on whether or not libc debug info is installed, when we
# hit a syscall catchpoint inside libc there might be a source line
# included in the output.
#
# This regexp will match an optional line and can be added to the
# expected catchpoint output to ignore the (possibly missing) source
# line.
set libc_src_line_re "(?:\r\n\[^\r\n\]+)?"

# Check the Python bp_modified_list and then reset the list back to
# empty.  TESTNAME is just a string.  BP_NUM is a list of breakpoint
# numbers that are expected to appear (in the given order) in the
# bp_modified_list.

proc check_modified_bp_list { testname bp_num } {
    if { [allow_python_tests] } {
	set expected [join $bp_num ", "]

	gdb_test "python print(bp_modified_list)" "\\\[$expected\\\]" \
	    $testname
	gdb_test_no_output -nopass "python bp_modified_list=\[\]" \
	    "reset bp_modified_list after $testname"
    }
}

# Build an executable and run tests on 'catch MODE'.

proc run_test { mode } {
    set exec_name ${::binfile}-${mode}

    set macro TEST_[string toupper $mode]

    if {[build_executable "build test executable" $exec_name $::srcfile \
	     [list debug shlib=$::libfile additional_flags=-D${macro}]] == -1} {
	return
    }

    clean_restart $exec_name
    gdb_load_shlib $::libfile

    if {![runto_main]} {
	return
    }

    if { $mode eq "syscall" } {
	gdb_test "catch syscall write" \
	    "Catchpoint $::decimal \\(syscall 'write' \[^)\]+\\)"
	set catch_re "call to syscall write"
    } elseif { $mode eq "signal" } {
	gdb_test "catch signal SIGUSR1" \
	    "Catchpoint $::decimal \\(signal SIGUSR1\\)"
	set catch_re "signal SIGUSR1"
    } elseif { $mode eq "fork" } {
	gdb_test "catch fork" \
	    "Catchpoint $::decimal \\(fork\\)"
	set catch_re "forked process $::decimal"
    } else {
	error "unknown mode $mode"
    }
    set cp_num [get_integer_valueof "\$bpnum" "*UNKNOWN*"]

    gdb_breakpoint "breakpt_before_exit"

    gdb_test "continue" \
	"Catchpoint ${cp_num} \[^\r\n\]+$::libc_src_line_re"

    if { [allow_python_tests] } {
	gdb_test_no_output "source $::pyfile" "import python scripts"
	check_modified_bp_list \
	    "check b/p modified observer has not yet triggered" {}
    }

    with_test_prefix "with false condition" {
	gdb_test_no_output "condition $cp_num ((struct lib_type *) opaque_ptr) != 0" \
	    "set catchpoint condition"

	check_modified_bp_list \
	    "catchpoint modified once by setting condition" \
	    [list $cp_num]

	gdb_run_cmd
	gdb_test "" [multi_line \
			 "Breakpoint $::decimal, main \\(\\) \[^\r\n\]+" \
			 "$::decimal\\s+\[^\r\n\]+"]

	check_modified_bp_list "catchpoint modified twice at startup" \
	    [list $cp_num $cp_num "$::decimal"]

	gdb_test "continue" \
	    [multi_line \
		 "Breakpoint $::decimal, breakpt_before_exit \\(\\) at \[^\r\n\]+" \
		 "$::decimal\\s+\[^\r\n\]+"] \
	    "continue to breakpt_before_exit"
    }

    # Check the bp_modified_list against '.*'.  We don't care at this
    # point what's in the list (nothing relevant has happened since we
    # last checked), but this has the side effect of clearing the list.
    check_modified_bp_list "clear bp modified list" { .* }

    with_test_prefix "with true condition" {
	gdb_test_no_output "condition $cp_num ((struct lib_type *) opaque_ptr) == 0" \
	    "set catchpoint condition"

	check_modified_bp_list \
	    "catchpoint modified once by setting condition" \
	    [list $cp_num]

	gdb_run_cmd
	gdb_test "" [multi_line \
			 "Breakpoint $::decimal, main \\(\\) \[^\r\n\]+" \
			 "$::decimal\\s+\[^\r\n\]+"]

	check_modified_bp_list "catchpoint modified twice at startup" \
	    [list $cp_num $cp_num "$::decimal"]

	gdb_test "continue" \
	    "Catchpoint $cp_num \\($catch_re\\), \[^\r\n\]+$::libc_src_line_re" \
	    "continue until catchpoint hit"

	check_modified_bp_list "catchpoint modified again when hit" \
	    [list $cp_num]
    }
}

# Run the tests.
foreach_with_prefix mode { syscall signal fork } {
    if { $mode == "syscall" && ![allow_xml_test] } {
	continue
    }
    run_test $mode
}