# Copyright (C) 2013-2021 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/>.

namespace eval PerfTest {
    # The name of python file on build.
    variable remote_python_file

    # A private method to set up GDB for performance testing.
    proc _setup_perftest {} {
	variable remote_python_file
	global srcdir subdir testfile

	set remote_python_file [gdb_remote_download host ${srcdir}/${subdir}/${testfile}.py]

	# Set sys.path for module perftest.
	with_test_prefix "setup perftest" {
	    gdb_test_no_output "python import os, sys"
	    gdb_test_no_output \
		"python sys.path.insert\(0, os.path.abspath\(\"${srcdir}/${subdir}/lib\"\)\)" \
		"python sys.path.insert\(0, os.path.abspath\(\"\${srcdir}/${subdir}/lib\"\)\)"
	    gdb_test_no_output \
		"python exec (open ('${remote_python_file}').read ())" \
		"python exec (open ('\${srcdir}/${subdir}/${testfile}.py').read ())"
	}
    }

    # A private method to do some cleanups when performance test is
    # finished.
    proc _teardown_perftest {} {
	variable remote_python_file

	remote_file host delete $remote_python_file
    }

    # Compile source files of test case.  BODY is the tcl code to do
    # actual compilation.  Return zero if compilation is successful,
    # otherwise return non-zero.
    proc compile {body} {
	return [uplevel 2 $body]
    }

    # Run the startup code.  Return zero if startup is successful,
    # otherwise return non-zero.
    proc startup {body} {
	return [uplevel 2 $body]
    }

    # Start up GDB.
    proc startup_gdb {body} {
	uplevel 2 $body
    }

    # Run the performance test.  Return zero if the run is successful,
    # otherwise return non-zero.
    proc run {body} {
	global timeout
	global GDB_PERFTEST_TIMEOUT

	set oldtimeout $timeout
	if { [info exists GDB_PERFTEST_TIMEOUT] } {
	    set timeout $GDB_PERFTEST_TIMEOUT
	} else {
	    set timeout 3000
	}
	set result [uplevel 2 $body]

	set timeout $oldtimeout
	return $result
    }

    # The top-level interface to PerfTest.
    # COMPILE is the tcl code to generate and compile source files.
    # STARTUP is the tcl code to start up GDB.
    # RUN is the tcl code to drive GDB to do some operations.
    # Each of COMPILE, STARTUP, and RUN return zero if successful, and
    # non-zero if there's a failure.

    proc assemble {compile startup run} {
	global GDB_PERFTEST_MODE

	if ![info exists GDB_PERFTEST_MODE] {
	    return
	}

	if { [string compare $GDB_PERFTEST_MODE "run"] != 0 } {
	    if { [eval compile {$compile}] } {
		untested "failed to compile"
		return
	    }
	}

	# Don't execute the run if GDB_PERFTEST_MODE=compile.
	if { [string compare $GDB_PERFTEST_MODE "compile"] == 0} {
	    return
	}

	verbose -log "PerfTest::assemble, startup ..."

	if [eval startup {$startup}] {
	    fail "startup"
	    return
	}

	verbose -log "PerfTest::assemble, done startup"

	_setup_perftest

	verbose -log "PerfTest::assemble, run ..."

	if [eval run {$run}] {
	    fail "run"
	}

	verbose -log "PerfTest::assemble, run complete."

	_teardown_perftest
    }
}

# Return true if performance tests are skipped.

proc skip_perf_tests { } {
    global GDB_PERFTEST_MODE

    if [info exists GDB_PERFTEST_MODE] {
	if { "$GDB_PERFTEST_MODE" != "compile"
	     && "$GDB_PERFTEST_MODE" != "run"
	     && "$GDB_PERFTEST_MODE" != "both" } {
	    error "Unknown value of GDB_PERFTEST_MODE."
	    return 1
	}

	return 0
    }

    return 1
}

# Given a list of tcl strings, return the same list as the text form of a
# python list.

proc tcl_string_list_to_python_list { l } {
    proc quote { text } {
	return "\"$text\""
    }
    set quoted_list ""
    foreach elm $l {
	lappend quoted_list [quote $elm]
    }
    return "([join $quoted_list {, }])"
}

# Helper routine for PerfTest::assemble "run" step implementations.
# Issues the "python ${OBJ}.run()" command, and consumes GDB output
# line by line.  Issues a FAIL if the command fails with a Python
# error.  Issues a PASS on success.  MESSAGE is an optional message to
# be printed.  If this is omitted, then the pass/fail messages use the
# command string as the message.

proc gdb_test_python_run {obj {message ""}} {
    global gdb_prompt

    set saw_error 0
    gdb_test_multiple "python ${obj}.run()" $message {
	-re "Error while executing Python code\\." {
	    set saw_error 1
	    exp_continue
	}
	-re "\[^\r\n\]*\r\n" {
	    exp_continue
	}
	-re "$gdb_prompt $" {
	    gdb_assert {!$saw_error} $gdb_test_name
	}
    }
}