209 lines
5.9 KiB
C++
209 lines
5.9 KiB
C++
/*
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* \brief Basic test for manually managing a sub RM session
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* \author Norman Feske
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* \date 2011-11-21
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*/
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/*
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* Copyright (C) 2011-2017 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 <util/string.h>
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#include <base/log.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/sleep.h>
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#include <rm_session/connection.h>
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#include <region_map/client.h>
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using namespace Genode;
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static void fail(char const *message)
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{
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error("FAIL: ", message);
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class Test_failed{};
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throw Test_failed();
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}
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static char const *test_pattern() {
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return "Pattern to verify dataspace content"; }
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static char const *test_pattern_2() {
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return "A second pattern to verify dataspace content"; }
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static void fill_ds_with_test_pattern(Env &env, char const *pattern,
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Dataspace_capability ds, size_t offset)
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{
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log("fill dataspace with information");
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char *content = env.rm().attach(ds);
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copy_cstring(content + offset, pattern, ~0);
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env.rm().detach(content);
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}
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static void validate_pattern_at(char const *pattern, char const *ptr)
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{
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if (strcmp(ptr, pattern) != 0)
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fail("test pattern not found");
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}
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void Component::construct(Env &env)
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{
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Attached_rom_dataspace config(env, "config");
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log("--- sub-rm test ---");
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log("create RM connection");
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enum { SUB_RM_SIZE = 1024*1024 };
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Rm_connection rm(env);
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/*
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* Free and re-allocate the region map to excersize the 'destroy'
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* operation.
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*/
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{
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log("create and destroy region map");
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Capability<Region_map> rm_cap = rm.create(SUB_RM_SIZE);
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rm.destroy(rm_cap);
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}
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/*
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* Create region cap to be used for the actual test
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*/
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log("create managed dataspace");
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Region_map_client sub_rm(rm.create(SUB_RM_SIZE));
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enum { DS_SIZE = 4*4096 };
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Ram_dataspace_capability ds = env.ram().alloc(DS_SIZE);
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/*
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* Write test patterns to the start and the second page of the RAM ds
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*/
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fill_ds_with_test_pattern(env, test_pattern(), ds, 0);
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fill_ds_with_test_pattern(env, test_pattern_2(), ds, 4096);
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if (!config.xml().attribute_value("support_attach_sub_any", true)) {
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log("attach RAM ds to any position at sub rm - this should fail");
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try {
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sub_rm.attach(ds, 0, 0, false, (addr_t)0);
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fail("sub rm attach_any unexpectedly did not fail");
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}
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catch (Region_map::Region_conflict) {
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log("attach failed as expected"); }
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}
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log("attach RAM ds to a fixed position at sub rm");
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enum { DS_SUB_OFFSET = 4096 };
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if ((addr_t)sub_rm.attach_at(ds, DS_SUB_OFFSET, 0, 0) != DS_SUB_OFFSET)
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fail("attach_at return-value mismatch");
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log("attach sub rm at local address space");
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/*
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* We use a fixed local address here because this makes the address space
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* layout more predictable. I.e., this simplifies the validation of
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* 'proc/pid/maps' after completing the test on Linux.
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*
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* Technically, this could let the test fail (if Linux decides to mmap the
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* vdso page to this location. reason ... keeping fingers crossed.
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*/
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addr_t const local_attach_addr =
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config.xml().attribute_value("local_attach_addr", (addr_t)0);
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char *sub_rm_base = env.rm().attach_at(sub_rm.dataspace(),
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local_attach_addr);
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log("validate pattern in sub rm");
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validate_pattern_at(test_pattern(), sub_rm_base + DS_SUB_OFFSET);
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/*
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* Pre-populated sub rm session appeared correctly in the local address
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* space. Now, test further populating the already attached sub rm session.
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*/
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log("attach RAM ds at another fixed position at sub rm");
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enum { DS_SUB_OFFSET_2 = 0x40000 };
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if ((addr_t)sub_rm.attach_at(ds, DS_SUB_OFFSET_2, 0, 0) != DS_SUB_OFFSET_2)
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fail("attach_at return-value mismatch");
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log("validate pattern in second mapping in sub rm");
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validate_pattern_at(test_pattern(), sub_rm_base + DS_SUB_OFFSET_2);
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/*
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* Try to cross the boundaries of the sub RM session. This should
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* produce an error.
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*/
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try {
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sub_rm.attach_at(ds, SUB_RM_SIZE - 4096, 0, 0);
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fail("undetected boundary conflict\n");
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}
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catch (Region_map::Region_conflict) {
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log("attaching beyond sub RM boundary failed as expected"); }
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/*
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* Check for working region - conflict detection
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*/
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log("attaching RAM ds to a conflicting region");
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try {
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sub_rm.attach_at(ds, DS_SUB_OFFSET + 4096, 0, 0);
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fail("region conflict went undetected\n");
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}
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catch (Region_map::Region_conflict) {
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log("attaching conflicting region failed as expected"); }
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if (config.xml().attribute_value("attach_twice_forbidden", false)) {
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/*
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* Try to double-attach the same sub RM session. This should fail
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*/
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log("attach sub rm again at local address space");
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try {
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env.rm().attach(sub_rm.dataspace());
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fail("double attachment of sub RM session went undetected\n");
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}
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catch (Region_map::Region_conflict) {
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log("doubly attaching sub RM session failed as expected"); }
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}
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/*
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* Try attaching RAM ds with offset (skipping the first page of
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* the RAM ds). We expect the second test pattern at the beginning
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* of the region. The region size should be automatically reduced by one
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* page.
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*/
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log("attach RAM ds with offset");
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enum { DS_SUB_OFFSET_3 = 0x80000 };
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sub_rm.attach_at(ds, DS_SUB_OFFSET_3, 0, 4096);
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validate_pattern_at(test_pattern_2(), sub_rm_base + DS_SUB_OFFSET_3);
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/*
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* Add the size parameter to the mix, attaching only a window of two pages
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* starting with the second page.
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*/
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log("attach RAM ds with offset and size");
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enum { DS_SUB_OFFSET_4 = 0xc0000 };
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sub_rm.attach_at(ds, DS_SUB_OFFSET_4, 2*4096, 4096);
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validate_pattern_at(test_pattern_2(), sub_rm_base + DS_SUB_OFFSET_4);
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/*
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* Detach the first attachment (to be validated by the run script by
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* inspecting '/proc/pid/maps' after running the test.
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*/
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sub_rm.detach((void *)DS_SUB_OFFSET);
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log("--- end of sub-rm test ---");
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/*
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* Do not return from main function to allow the run script to inspect the
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* memory mappings after completing the test.
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*/
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sleep_forever();
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}
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