binutils-gdb/gdb/testsuite/gdb.base/watch-before-fork.exp

# Copyright 2021-2022 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 PR gdb/28621.  Test that GDB does not misreport
# a watchpoint hit when a previous watchpoint hit is immediately
# followed by a catchpoint hit.

# This test uses "awatch".
if {[skip_hw_watchpoint_access_tests]} {
    return
}

standard_testfile

if {[build_executable "failed to prepare" $testfile $srcfile debug]} {
    return
}

# Check that fork catchpoints are supported.  Returns 1 if they are.
# Returns 0 and issues unsupported if they are not supported.  If it
# couldn't be determined, returns 0 (but does not call unsupported).

proc_with_prefix catch_fork_supported {} {
    clean_restart $::testfile

    if { ![runto_main] } {
	return 0
    }

    # Verify that the system supports "catch fork".
    gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
    set has_fork_catchpoints -1
    gdb_test_multiple "continue" "continue to first fork catchpoint" {
	-re -wrap ".*Your system does not support this type\r\nof catchpoint.*" {
	    set has_fork_catchpoints 0
	    pass $gdb_test_name
	}
	-re -wrap ".*Catchpoint.*" {
	    set has_fork_catchpoints 1
	    pass $gdb_test_name
	}
    }

    if {$has_fork_catchpoints == 1} {
	return 1
    } elseif {$has_fork_catchpoints == -1} {
	return 0
    } else {
	unsupported "catch fork not supported"
	return 0
    }
}

# The test proper.

proc_with_prefix test {} {
    clean_restart $::testfile

    if { ![runto_main] } {
	return 0
    }

    gdb_test "awatch global_var" \
	"Hardware access \\(read/write\\) watchpoint .*: global_var.*" \
	"watchpoint on global variable"

    gdb_test "continue" \
	"Hardware access \\(read/write\\) watchpoint .*: global_var.*" \
	"continue to watchpoint"

    set seen_watchpoint 0
    gdb_test_multiple "continue" "continue to catch fork" {
	-re "watchpoint" {
	    set seen_watchpoint 1
	    exp_continue
	}
	-re "$::gdb_prompt " {
	    gdb_assert { !$seen_watchpoint } $gdb_test_name
	}
    }
}

if {![catch_fork_supported] } {
    return
}

test