# Copyright (C) 2013-2020 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/>.

# Regression test for PR15693.  A breakpoint with a condition that
# calls a function that evaluates false would result in a spurious
# *running event sent to the frontend each time the breakpoint is hit
# (and the target re-resumed).  Like:
#
#  -exec-continue
#  ^running
#  *running,thread-id="all"
#  (gdb)
#  *running,thread-id="all"
#  *running,thread-id="all"
#  *running,thread-id="all"
#  *running,thread-id="all"
#  *running,thread-id="all"
#  ...

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

# Run either the multi-threaded or the single-threaded variant of the
# test, as determined by VARIANT.
proc test { variant } {
    global gdb_test_file_name
    global testfile srcdir subdir srcfile srcfile2 binfile
    global mi_gdb_prompt async

    with_test_prefix "$variant" {
	gdb_exit
	if [mi_gdb_start] {
	    continue
	}

	set options {debug}
	if {$variant == "mt" } {
	    lappend options "pthreads"
	}

	# Don't use standard_testfile as we need a different binary
	# for each variant.
	set testfile $gdb_test_file_name-$variant
	set binfile [standard_output_file ${testfile}]
	set srcfile $testfile.c
	set srcfile2 $gdb_test_file_name.c

	if {[build_executable "failed to prepare" \
		 $testfile \
		 "${srcfile} ${srcfile2}" \
		 $options] == -1} {
	    return -1
	}

	mi_delete_breakpoints
	mi_gdb_reinitialize_dir $srcdir/$subdir
	mi_gdb_reinitialize_dir $srcdir/$subdir
	mi_gdb_load ${binfile}

	mi_runto test

	# Leave the breakpoint at 'test' set, on purpose.  The next
	# resume shall emit a single '*running,thread-id="all"', even
	# if GDB needs to step over a breakpoint (that is, even if GDB
	# needs to run only one thread for a little bit).

	set bp_location [gdb_get_line_number "set breakpoint here" $srcfile2]
	set bp_location_end [gdb_get_line_number "set end breakpoint here" $srcfile2]

	mi_gdb_test "-break-insert -c return_false() $srcfile2:$bp_location" ".*" \
	    "insert conditional breakpoint"

	mi_gdb_test "-break-insert $srcfile2:$bp_location_end" ".*" \
	    "insert end breakpoint"

	set msg "no spurious *running notifications"
	send_gdb "-exec-continue\n"
	gdb_expect {
	    -re "\\*running.*\\*running.*\\*stopped" {
		fail $msg
	    }
	    -re "\\^running\r\n\\*running,thread-id=\"all\"\r\n${mi_gdb_prompt}.*\\*stopped" {
		pass $msg
	    }
	    timeout {
		fail "$msg (timeout)"
	    }
	}

	# In sync mode, there's an extra prompt after *stopped.  Consume it.
	if {!$async} {
	    gdb_expect {
		-re "$mi_gdb_prompt" {
		}
	    }
	}
    }
}

# Single-threaded.
test "st"

# Multi-threaded.
test "mt"