gdb/testsuite/gdb.mi/mi-condbreak-throw.exp

# Copyright (C) 2023-2024 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/>.

# Check that when GDB fails to evaluate the condition of a conditional
# breakpoint we only get one *stopped notification.  In this test case
# the breakpoint condition fails due to throwing an uncaught C++
# excpetion.

require allow_cplus_tests

load_lib mi-support.exp
set MIFLAGS "-i=mi"

standard_testfile .cc

if [build_executable ${testfile}.exp ${binfile} ${srcfile} {debug c++}] {
    return -1
}

# Create a breakpoint with a condition that invokes an inferior
# function call, that will segfault.  Run until GDB hits the
# breakpoint and check how GDB reports the failed condition check.
#
# UNWIND_ON_EXCEPTION is either 'on' or 'off'.  This is used to configure
# GDB's 'set unwind-on-terminating-exception' setting.

proc run_test { unwind_on_exception } {

    if {[mi_clean_restart $::binfile]} {
	return
    }

    if {[mi_runto_main] == -1} {
	return
    }

    mi_gdb_test "-gdb-set unwind-on-terminating-exception ${unwind_on_exception}" {\^done} \
	"set unwind-on-terminating-exception"

    # Create the conditional breakpoint.
    set bp_location [gdb_get_line_number "Set breakpoint here"]
    mi_create_breakpoint "-c \"cond_throw ()\" $::srcfile:$bp_location" \
	"insert conditional breakpoint" \
	-func "foo\\(\\)" -file ".*$::srcfile" -line "$bp_location" \
	-cond "cond_throw \\(\\)"

    # Number of the previous breakpoint.
    set bpnum [mi_get_valueof "/d" "\$bpnum" "INVALID" \
		   "get number for breakpoint"]

    # The line where we expect the inferior to crash.
    set crash_linenum 0
    #[gdb_get_line_number "Crash here"]

    # Run the inferior and wait for it to stop.
    mi_send_resuming_command "exec-continue" "continue the inferior"

    if {$unwind_on_exception} {
	mi_gdb_test "" \
	    [multi_line \
		 "&\"Error in testing condition for breakpoint $bpnum:\\\\n\"" \
		 "&\"The program being debugged entered a std::terminate call, most likely\\\\n\"" \
		 "&\"caused by an unhandled C\\+\\+ exception.  GDB blocked this call in order\\\\n\"" \
		 "&\"to prevent the program from being terminated, and has restored the\\\\n\"" \
		 "&\"context to its original state before the call.\\\\n\"" \
		 "&\"To change this behaviour use \\\\\"set unwind-on-terminating-exception off\\\\\"\\.\\\\n\"" \
		 "&\"Evaluation of the expression containing the function \\(cond_throw\\(\\)\\)\\\\n\"" \
		 "&\"will be abandoned.\\\\n\"" \
		 "=breakpoint-modified,bkpt={number=\"$bpnum\",type=\"breakpoint\",\[^\r\n\]+times=\"1\",\[^\r\n\]+}" \
		 "~\"\\\\n\"" \
		 "~\"Breakpoint $bpnum, foo \\(\\) at \[^\r\n\]+/${::srcfile}:${bp_location}\\\\n\"" \
		 "~\"${bp_location}\\\\t\[^\r\n\]+Set breakpoint here\\.\[^\r\n\]+\\\\n\"" \
		 "\\*stopped,reason=\"breakpoint-hit\",disp=\"keep\",bkptno=\"$bpnum\",frame=\\{addr=\"$::hex\",func=\"foo\"\\,args=\\\[\\\],file=\"\[^\r\n\]+\",fullname=\"\[^\r\n\]+\",line=\"$bp_location\",\[^\r\n\]+}\[^\r\n\]+"] \
	    "wait for stop"

	mi_info_frame "check the current frame" \
	    -level 0 -func foo -line $bp_location
    } else {
	# This pattern matches multiple lines being sent to MI's
	# stdout stream (that is wrapped in ~"...").  Depending on
	# where exactly the thread stops, and which debug info is
	# available, the following stop will produce different numbers
	# of lines.
	set out_ln_re "(?:\r\n\[~&\]\"\[^\r\n\]+\")*"

	mi_gdb_test "" \
	    [multi_line \
		 ".*~\"\\\\nProgram\"" \
		 "~\" received signal SIGABRT, Aborted\\.\\\\n\"${out_ln_re}" \
		 "\\*stopped,reason=\"signal-received\",signal-name=\"SIGABRT\"\[^\r\n\]+frame=\\{addr=\"$::hex\",\[^\r\n\]+\\}\[^\r\n\]+" \
		 "&\"Error in testing condition for breakpoint $bpnum:\\\\n\"" \
		 "&\"The program being debugged was signaled while in a function called from GDB\\.\\\\n\"" \
		 "&\"GDB remains in the frame where the signal was received\\.\\\\n\"" \
		 "&\"To change this behavior use \\\\\"set unwindonsignal on\\\\\"\\.\\\\n\"" \
		 "&\"Evaluation of the expression containing the function\\\\n\"" \
		 "&\"\\(cond_throw\\(\\)\\) will be abandoned\\.\\\\n\"" \
		 "&\"When the function is done executing, GDB will silently stop\\.\\\\n\"" \
		 "=breakpoint-modified,bkpt={number=\"$bpnum\",type=\"breakpoint\",\[^\r\n\]+times=\"1\",\[^\r\n\]+}"] \
	    "wait for stop"

	# Don't try to check the current frame here, the inferior will
	# be stopped somewhere in the C++ runtime at the point where
	# it is determined that the exception has not been handled.
    }
}

foreach_with_prefix unwind_on_exception { off } {
    run_test $unwind_on_exception
}