os: add init_loop test
This test monitors the RAM quota of a dynamic init and a server hosted within the dynamic init in the presence of a repeatedly created and destructed client.
This commit is contained in:
Norman Feske
Christian Helmuth
parent
91b2e023b8
commit
7088e4faaa
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create_boot_directory
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import_from_depot genodelabs/src/[base_src] \
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genodelabs/src/report_rom
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install_config {
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<config>
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<parent-provides>
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<service name="ROM"/>
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<service name="CPU"/>
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<service name="PD"/>
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<service name="LOG"/>
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<service name="IRQ"/>
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<service name="IO_MEM"/>
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<service name="IO_PORT"/>
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</parent-provides>
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<default caps="100"/>
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<start name="timer">
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<resource name="RAM" quantum="1M"/>
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<provides><service name="Timer"/></provides>
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<route> <any-service> <parent/> </any-service> </route>
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</start>
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<start name="report_rom">
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<resource name="RAM" quantum="2M"/>
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<provides> <service name="ROM"/> <service name="Report"/> </provides>
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<config verbose="no">
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<policy label="init -> config" report="test-init_loop -> init.config"/>
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<policy label="test-init_loop -> state" report="init -> state"/>
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</config>
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<route> <any-service> <parent/> </any-service> </route>
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</start>
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<start name="test-init_loop">
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<resource name="RAM" quantum="4M"/>
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<provides> <service name="LOG"/> </provides>
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<config/>
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<route>
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<service name="Report"> <child name="report_rom"/> </service>
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<service name="ROM" label="state"> <child name="report_rom"/> </service>
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<service name="Timer"> <child name="timer"/> </service>
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<any-service> <parent/> </any-service>
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</route>
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</start>
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<start name="init" caps="2000">
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<binary name="init"/>
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<resource name="RAM" quantum="8M"/>
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<route>
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<service name="ROM" label="config"> <child name="report_rom"/> </service>
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<service name="Report"> <child name="report_rom"/> </service>
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<service name="Timer"> <child name="timer"/> </service>
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<any-service> <parent/> </any-service>
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</route>
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</start>
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</config>}
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build { lib/ld init app/dummy test/init_loop }
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build_boot_image { ld.lib.so init dummy test-init_loop }
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append qemu_args " -nographic "
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run_genode_until {.*child "test-init_loop" exited with exit value 0.*} 100
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@ -0,0 +1,257 @@
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/*
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* \brief Test for the repeated child creation in a dynamic init
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* \author Norman Feske
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* \date 2018-06-07
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#include <base/heap.h>
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#include <base/component.h>
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#include <base/attached_rom_dataspace.h>
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#include <base/session_state.h>
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#include <log_session/log_session.h>
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#include <os/reporter.h>
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namespace Test {
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struct Main;
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using namespace Genode;
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}
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struct Test::Main
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{
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Env &_env;
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bool _client_starting = false;
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Expanding_reporter _init_config_reporter { _env, "config", "init.config" };
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void _gen_log_server_start_content(Xml_generator &xml) const
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{
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xml.attribute("name", "server");
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xml.attribute("caps", "100");
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xml.node("resource", [&] () {
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xml.attribute("name", "RAM");
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xml.attribute("quantum", "1M"); });
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xml.node("binary", [&] () {
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xml.attribute("name", "dummy"); });
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xml.node("config", [&] () {
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xml.node("log_service", [&] () {}); });
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xml.node("provides", [&] () {
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xml.node("service", [&] () {
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xml.attribute("name", Log_session::service_name()); }); });
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xml.node("route", [&] () {
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xml.node("any-service", [&] () {
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xml.node("parent", [&] () {}); }); });
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}
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void _gen_log_client_start_content(Xml_generator &xml) const
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{
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xml.attribute("name", "client");
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xml.attribute("caps", "200");
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xml.node("resource", [&] () {
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xml.attribute("name", "RAM");
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xml.attribute("quantum", "1M"); });
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xml.node("binary", [&] () {
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xml.attribute("name", "dummy"); });
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xml.node("config", [&] () {
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xml.node("create_log_connections", [&] () {
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xml.attribute("count", 1);
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xml.attribute("ram_upgrade", "64K");
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});
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xml.node("log", [&] () {
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xml.attribute("string", "client started"); }); });
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xml.node("route", [&] () {
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xml.node("service", [&] () {
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xml.attribute("name", Log_session::service_name());
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xml.node("child", [&] () {
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xml.attribute("name", "server"); });
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});
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xml.node("any-service", [&] () {
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xml.node("parent", [&] () {}); });
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});
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}
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void _gen_init_config(Xml_generator &xml) const
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{
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xml.node("report", [&] () {
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xml.attribute("requested", "yes");
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xml.attribute("init_ram", "yes");
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xml.attribute("init_caps", "yes");
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xml.attribute("child_ram", "yes");
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xml.attribute("child_caps", "yes");
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xml.attribute("delay_ms", 100);
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});
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auto gen_service = [&] (char const *name) {
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xml.node("service", [&] () { xml.attribute("name", name); }); };
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xml.node("parent-provides", [&] () {
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gen_service("ROM");
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gen_service("CPU");
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gen_service("PD");
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gen_service("RM");
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gen_service("LOG");
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});
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xml.node("start", [&] () {
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_gen_log_server_start_content(xml); });
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if (_client_starting)
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xml.node("start", [&] () {
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_gen_log_client_start_content(xml); });
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}
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void generate_init_config()
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{
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_init_config_reporter.generate([&] (Xml_generator &xml) {
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_gen_init_config(xml); });
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}
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/*
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* Handling of state reports generated by init
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*/
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Attached_rom_dataspace _init_state { _env, "state" };
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Signal_handler<Main> _init_state_handler {
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_env.ep(), *this, &Main::_handle_init_state };
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/* counter for iterations */
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unsigned _cnt = 0;
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struct Ram_tracker
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{
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typedef String<32> Name;
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Name const _name;
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/* RAM quota of previous iteration */
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size_t _previous = 0;
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size_t total_loss = 0;
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void update(Xml_node ram)
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{
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size_t const current = ram.attribute_value("quota", Number_of_bytes());
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log(_name, " RAM: ", Number_of_bytes(current));
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if (_previous) {
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if (current < _previous) {
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total_loss += _previous - current;
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log(_name, " lost ", _previous - current, ", bytes", " "
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"(total ", total_loss, " bytes)");
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}
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if (current > _previous)
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log(_name, " gained ", current - _previous, ", bytes");
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}
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_previous = current;
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}
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Ram_tracker(Name const &name) : _name(name) { }
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};
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Ram_tracker _init_ram_tracker { "init" };
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Ram_tracker _server_ram_tracker { "server" };
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static Number_of_bytes _init_ram(Xml_node state)
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{
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/* \throw Nonexistent_sub_node */
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return state.sub_node("ram").attribute_value("quota", Number_of_bytes());
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}
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typedef String<32> Name;
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template <typename FN>
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void _apply_child(Xml_node state, Name const &name, FN const &fn)
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{
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state.for_each_sub_node("child", [&] (Xml_node child) {
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if (child.attribute_value("name", Name()) == name)
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fn(child); });
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}
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void _handle_init_state()
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{
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_init_state.update();
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Xml_node const state = _init_state.xml();
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/*
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* Detect state where the client is running and has established a
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* session to the LOG server.
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*/
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bool client_present = false;
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bool client_complete = false;
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_apply_child(state, "client", [&] (Xml_node child) {
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client_present = true;
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child.for_each_sub_node("requested", [&] (Xml_node requested) {
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requested.for_each_sub_node("session", [&] (Xml_node session) {
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if (session.attribute_value("service", String<16>()) == "LOG"
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&& session.attribute_value("state", String<16>()) == "CAP_HANDED_OUT")
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client_complete = true; }); }); });
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if (_client_starting) {
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/* kill client as soon as it started up completely */
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if (client_complete)
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_client_starting = false;
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} else {
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/* restart client as soon as it vanished */
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if (!client_present) {
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_cnt++;
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log("iteration ", _cnt);
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if (state.has_sub_node("ram"))
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_init_ram_tracker.update(state.sub_node("ram"));
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_apply_child(state, "server", [&] (Xml_node child) {
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_server_ram_tracker.update(child.sub_node("ram")); });
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_client_starting = true;
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}
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}
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if (_init_ram_tracker.total_loss > 16*1024
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|| _server_ram_tracker.total_loss > 16*1024) {
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error("unexpected quota distribution");
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_env.parent().exit(1);
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}
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/* success after 50 iterations without any accounting issues */
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if (_cnt == 50)
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_env.parent().exit(0);
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generate_init_config();
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}
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Main(Env &env) : _env(env)
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{
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_init_state.sigh(_init_state_handler);
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generate_init_config();
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}
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};
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void Component::construct(Genode::Env &env) { static Test::Main main(env); }
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@ -0,0 +1,3 @@
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TARGET = test-init_loop
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SRC_CC = main.cc
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LIBS += base
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@ -19,6 +19,7 @@ fs_log
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fs_report
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gdb_monitor
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init
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init_loop
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init_smp
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input_filter
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ldso
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