gdb/testsuite/gdb.base/infcall-failure.exp

# Copyright 2022-2024 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/>.

# Some simple tests of inferior function calls from breakpoint
# conditions, in a single-threaded inferior.
#
# Test what happens when the inferior function (from a breakpoint
# condition) either hits a nested breakpoint, or segfaults.

standard_testfile

if { [build_executable "failed to prepare" ${binfile} "${srcfile}" \
	  {debug}] == -1 } {
    return
}

set bp_1_line [gdb_get_line_number "First breakpoint"]
set bp_2_line [gdb_get_line_number "Second breakpoint"]
set segv_line [gdb_get_line_number "Segfault here"]

# Start GDB based on TARGET_ASYNC and TARGET_NON_STOP, and then runto
# main.
proc start_gdb_and_runto_main { target_async target_non_stop } {
    save_vars { ::GDBFLAGS } {
	append ::GDBFLAGS \
	    " -ex \"maint set target-non-stop $target_non_stop\""
	append ::GDBFLAGS \
	    " -ex \"maintenance set target-async ${target_async}\""

	clean_restart ${::binfile}
    }

    if { ![runto_main] } {
	return -1
    }

    return 0
}

# Start GDB according to ASYNC_P and NON_STOP_P, then setup a
# conditional breakpoint.  The breakpoint condition includes an
# inferior function call that will itself hit a breakpoint.  Check how
# GDB reports this to the user.
proc_with_prefix run_cond_hits_breakpoint_test { async_p non_stop_p } {
    if { [start_gdb_and_runto_main $async_p $non_stop_p] == -1 } {
	return
    }

    # Setup the conditional breakpoint and record its number.
    gdb_breakpoint "${::srcfile}:${::bp_1_line} if (func_bp ())"
    set bp_1_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
		     "get number of first breakpoint"]

    # Setup a breakpoint inside func_bp.
    gdb_breakpoint "${::srcfile}:${::bp_2_line}"
    set bp_2_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
		     "get number of second breakpoint"]

    gdb_test "continue" \
	[multi_line \
	     "Continuing\\." \
	     "" \
	     "Breakpoint ${bp_2_num}, func_bp \\(\\) at \[^\r\n\]+:${::bp_2_line}" \
	     "${::decimal}\\s+\[^\r\n\]+Second breakpoint\[^\r\n\]+" \
	     "Error in testing condition for breakpoint ${bp_1_num}:" \
	     "The program being debugged stopped while in a function called from GDB\\." \
	     "Evaluation of the expression containing the function" \
	     "\\(func_bp\\) will be abandoned\\." \
	     "When the function is done executing, GDB will silently stop\\."]
}

# Start GDB according to ASYNC_P and NON_STOP_P, then call an inferior
# function.  The inferior function being called will itself have a
# breakpoint within it.  Check how GDB reports this to the user.
proc_with_prefix run_call_hits_breakpoint_test { async_p non_stop_p } {
    if { [start_gdb_and_runto_main $async_p $non_stop_p] == -1 } {
	return
    }

    # Setup a breakpoint inside func_bp.
    gdb_breakpoint "${::srcfile}:${::bp_2_line}"
    set bp_2_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
		      "get number of second breakpoint"]


    gdb_test "call func_bp ()" \
	[multi_line \
	     "" \
	     "Breakpoint ${bp_2_num}, func_bp \\(\\) at \[^\r\n\]+:${::bp_2_line}" \
	     "${::decimal}\\s+\[^\r\n\]+Second breakpoint\[^\r\n\]+" \
	     "The program being debugged stopped while in a function called from GDB\\." \
	     "Evaluation of the expression containing the function" \
	     "\\(func_bp\\) will be abandoned\\." \
	     "When the function is done executing, GDB will silently stop\\."]
}

# Start GDB according to ASYNC_P and NON_STOP_P, then setup a
# conditional breakpoint.  The breakpoint condition includes an
# inferior function call that segfaults.  Check how GDB reports this
# to the user.
proc_with_prefix run_cond_hits_segfault_test { async_p non_stop_p } {
    if { [start_gdb_and_runto_main $async_p $non_stop_p] == -1 } {
	return
    }

    # This test relies on the inferior segfaulting when trying to
    # access address zero.
    if { [is_address_zero_readable] } {
	unsupported "address zero is readable"
	return
    }

    # Setup the conditional breakpoint and record its number.
    gdb_breakpoint "${::srcfile}:${::bp_1_line} if (func_segfault ())"
    set bp_1_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
		     "get number of first breakpoint"]

    gdb_test "continue" \
	[multi_line \
	     "Continuing\\." \
	     "" \
	     "Program received signal SIGSEGV, Segmentation fault\\." \
	     "${::hex} in func_segfault \\(\\) at \[^\r\n\]+:${::segv_line}" \
	     "${::decimal}\\s+\[^\r\n\]+Segfault here\[^\r\n\]+" \
	     "Error in testing condition for breakpoint ${bp_1_num}:" \
	     "The program being debugged was signaled while in a function called from GDB\\." \
	     "GDB remains in the frame where the signal was received\\." \
	     "To change this behavior use \"set unwindonsignal on\"\\." \
	     "Evaluation of the expression containing the function" \
	     "\\(func_segfault\\) will be abandoned\\." \
	     "When the function is done executing, GDB will silently stop\\."]
}

# Start GDB according to ASYNC_P and NON_STOP_P, then call an inferior
# function.  The inferior function will segfault.  Check how GDB
# reports this to the user.
proc_with_prefix run_call_hits_segfault_test { async_p non_stop_p } {
    if { [start_gdb_and_runto_main $async_p $non_stop_p] == -1 } {
	return
    }

    # This test relies on the inferior segfaulting when trying to
    # access address zero.
    if { [is_address_zero_readable] } {
	unsupported "address zero is readable"
	return
    }

    gdb_test "call func_segfault ()" \
	[multi_line \
	     "" \
	     "Program received signal SIGSEGV, Segmentation fault\\." \
	     "${::hex} in func_segfault \\(\\) at \[^\r\n\]+:${::segv_line}" \
	     "${::decimal}\\s+\[^\r\n\]+Segfault here\[^\r\n\]+" \
	     "The program being debugged was signaled while in a function called from GDB\\." \
	     "GDB remains in the frame where the signal was received\\." \
	     "To change this behavior use \"set unwindonsignal on\"\\." \
	     "Evaluation of the expression containing the function" \
	     "\\(func_segfault\\) will be abandoned\\." \
	     "When the function is done executing, GDB will silently stop\\."]
}

foreach_with_prefix target_async { "on" "off" } {
    foreach_with_prefix target_non_stop { "on" "off" } {
	run_cond_hits_breakpoint_test $target_async $target_non_stop
	run_call_hits_breakpoint_test $target_async $target_non_stop

	run_cond_hits_segfault_test $target_async $target_non_stop
	run_call_hits_segfault_test $target_async $target_non_stop
    }
}