binutils-gdb/gdb/testsuite/gdb.trace/trace-enable-disable.exp

# Copyright 2015-2018 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/>.

load_lib "trace-support.exp"

if {[skip_shlib_tests]} {
    return 0
}

standard_testfile
set executable $testfile
set expfile $testfile.exp

# Some targets have leading underscores on assembly symbols.
set options [list debug [gdb_target_symbol_prefix_flags]]

# Check that the target supports trace.
if ![gdb_trace_common_supports_arch] {
    unsupported "no trace-common.h support for arch"
    return -1
}
if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile executable $options] != "" } {
    untested "failed to compile"
    return -1
}

clean_restart ${testfile}

if ![runto_main] {
    fail "can't run to main to check for trace support"
    return -1
}

if ![gdb_target_supports_trace] {
    unsupported "target does not support trace"
    return -1
}

# Compile the test case with the in-process agent library.
set libipa [get_in_proc_agent]
gdb_load_shlib $libipa

lappend options shlib=$libipa

if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile executable $options] != "" } {
    untested "failed to compile with in-process agent library"
    return -1
}

# This test makes sure that disabling and enabling tracepoints works
# correctly.  TRACEPOINT_CMD is the command used to set tracepoints
# (e.g. trace or ftrace).

proc test_tracepoint_enable_disable { tracepoint_cmd } {
    with_test_prefix "test_tracepoint_enable_disable $tracepoint_cmd" {
	global executable
	clean_restart ${executable}

	set expected 0

	if ![runto_main] {
	    fail "can't run to main."
	    return -1
	}

	gdb_test "$tracepoint_cmd point_a" "(Tracepoint|Fast tracepoint) 2.*"
	gdb_test "$tracepoint_cmd point_b" "(Tracepoint|Fast tracepoint) 3.*"
	gdb_breakpoint "break_here"
	gdb_test_no_output "tstart"

	# Test that tracepoints start enabled
	with_test_prefix "start" {
	    gdb_continue "break_here"
	    incr expected 2
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}

	# Test that disabling works
	with_test_prefix "disable #1" {
	    gdb_test_no_output "disable 2"
	    gdb_continue "break_here"
	    incr expected 1
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}

	with_test_prefix "disable #2" {
	    gdb_test_no_output "disable 3"
	    gdb_continue "break_here"
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}

	# Test that disabling an already disabled tracepoint works
	with_test_prefix "disable #3" {
	    gdb_test_no_output "disable 2"
	    gdb_continue "break_here"
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}

	# Test that enabling works
	with_test_prefix "enable #1" {
	    gdb_test_no_output "enable 2"
	    gdb_continue "break_here"
	    incr expected 1
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}

	with_test_prefix "enable #2" {
	    gdb_test_no_output "enable 3"
	    gdb_continue "break_here"
	    incr expected 2
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}

	# Test that enabling an already enabled tracepoint works
	with_test_prefix "enable #3" {
	    gdb_test_no_output "enable 3"
	    gdb_continue "break_here"
	    incr expected 2
	    gdb_test "tstatus" "Collected $expected trace frames.*"
	}
    }
}

test_tracepoint_enable_disable trace
test_tracepoint_enable_disable ftrace