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385b7cdd31
Revised region management detects region conflicts by using _soft_ mappings per default. Overmapping is activated for population of managed dataspaces only. For more information see header documentation of base-linux/src/base/env/rm_session_mmap.cc. Fixes #883.
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*
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* \brief Linux region-map test
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* \author Christian Helmuth
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* \date 2013-09-06
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*/
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/*
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* Copyright (C) 2006-2013 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 General Public License version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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#include <base/env.h>
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#include <base/crt0.h>
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#include <base/sleep.h>
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#include <base/thread.h>
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#include <util/misc_math.h>
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#include <rm_session/connection.h>
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extern "C" void wait_for_continue();
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int main()
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{
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using namespace Genode;
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/* activate for early printf in Rm_session_mmap::attach() etc. */
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if (0) Thread_base::trace("FOO");
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/* induce initial heap expansion to remove RM noise */
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if (1) {
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void *addr(env()->heap()->alloc(0x100000));
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env()->heap()->free(addr, 0);
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}
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addr_t beg((addr_t)&_prog_img_beg);
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addr_t end(align_addr((addr_t)&_prog_img_end, 12));
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size_t size(end - beg);
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PLOG("program-image region [%016lx,%016lx) size=%zx", beg, end, size);
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/* RAM dataspace attachment overlapping binary */
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try {
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Ram_dataspace_capability ds(env()->ram_session()->alloc(size));
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PLOG("before RAM dataspace attach");
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env()->rm_session()->attach_at(ds, beg);
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PERR("after RAM dataspace attach -- ERROR");
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} catch (Rm_session::Region_conflict) {
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PLOG("OK caught Region_conflict exception");
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}
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/* empty managed dataspace overlapping binary */
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try {
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Rm_connection rm(0, size);
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Dataspace_capability ds(rm.dataspace());
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PLOG("before sub-RM dataspace attach");
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env()->rm_session()->attach_at(ds, beg);
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PERR("after sub-RM dataspace attach -- ERROR");
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} catch (Rm_session::Region_conflict) {
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PLOG("OK caught Region_conflict exception");
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}
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/* sparsely populated managed dataspace in free VM area */
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try {
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Rm_connection rm(0, 0x100000);
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rm.attach_at(env()->ram_session()->alloc(0x1000), 0x1000);
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Dataspace_capability ds(rm.dataspace());
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PLOG("before populated sub-RM dataspace attach");
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char *addr = (char *)env()->rm_session()->attach(ds) + 0x1000;
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PLOG("after populated sub-RM dataspace attach / before touch");
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char const val = *addr;
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*addr = 0x55;
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PLOG("after touch (%x/%x)", val, *addr);
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} catch (Rm_session::Region_conflict) {
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PLOG("OK caught Region_conflict exception -- ERROR");
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}
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sleep_forever();
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}
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