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2310 discussions

exception propagation
by Daniel Waddington 12 Aug '11

12 Aug '11

Hi, I'm trying to catch a Region_conflict exception from a call to env()->rm_ression()->attach(...). By putting printfs in the Genode code I see the exception is being thrown in the rm-session-component, but it does not seem to be getting propagated back to the client app. Can someone check the new GENODE_RPC_THROW macro is working correctly? Fiasco.OC x86_32. Thanks Daniel

3 2

Possible race (FiascoOC) signalling?
by Daniel Waddington 29 Jul '11

29 Jul '11

Hi, I'm having problem with some intermittent error reported as follows: [init -> test-pager-2] Test::Pager::Pager(): Pager constructed OK. page fault (READ pf_addr=1004000 pf_ip=1011748 from 44a000) page fault (READ pf_addr=1006000 pf_ip=1011748 from 44a000) page fault (READ pf_addr=1008000 pf_ip=1011748 from 44a000) [init -> test-pager-2] Test-pager-2 example. ;-)) [init -> test-pager-2] Test::SharedMemory::SharedMemory(): About to start the pager. KERNEL: Warning: nothing mapped: (Obj_space) from [0xfcdcedec/a3]: 00000407 size: 00000001 to [0xfcdcedec/a3] KERNEL: Warning: nothing mapped: (Obj_space) from [0xfcdcedec/a3]: 0000040b size: 00000001 to [0xfcdcef4c/b] KERNEL: Warning: nothing mapped: (Obj_space) from [0xfcdcef4c/b]: 00000206 size: 00000001 to [0xfcdcef4c/b] KERNEL: Warning: nothing mapped: (Obj_space) from [0xfcdcedec/a3]: 0000040b size: 00000001 to [0xfcdcef4c/b] KERNEL: Warning: nothing mapped: (Obj_space) from [0xfcdcef4c/b]: 00000206 size: 00000001 to [0xfcdcef4c/b] page fault (READ pf_addr=4db30 pf_ip=4db30 from 44a000) page fault (READ pf_addr=4a310 pf_ip=4a310 from 44a000) page fault (READ pf_addr=49ce0 pf_ip=49ce0 from 44a000) page fault (READ pf_addr=6b004 pf_ip=4ac5b from 44a000) page fault (READ pf_addr=6c008 pf_ip=4ac5b from 44a000) page fault (READ pf_addr=6d000 pf_ip=4a958 from 44a000) page fault (READ pf_addr=6e004 pf_ip=4ac5b from 44a000) page fault (READ pf_addr=6f00c pf_ip=4ac5b from 44a000) page fault (WRITE pf_addr=231c pf_ip=4c111 from 44a000) page fault (READ pf_addr=47ae0 pf_ip=47ae0 from 44a000) page fault (READ pf_addr=48134 pf_ip=48135 from 44a000) page fault (READ pf_addr=8e034 pf_ip=4b17e from 44a000) page fault (READ pf_addr=4eb70 pf_ip=4eb70 from 44a000) page fault (READ pf_addr=44770 pf_ip=44770 from 44a000) page fault (READ pf_addr=46030 pf_ip=46030 from 44a000) page fault (READ pf_addr=456d0 pf_ip=456d0 from 44a000) [init -> test-pager-2] C++ runtime: Genode::Rm_session::Invalid_thread [init -> test-pager-2] void* abort(): abort called In the following code it seems to occur as a result of the Signal / _receiver calls. Any ideas?? #include <base/printf.h> #include <base/sleep.h> #include <base/rpc_server.h> #include <cap_session/connection.h> #include <dataspace/client.h> #include <rom_session/connection.h> #include <rm_session/connection.h> #include <ram_session/connection.h> #include <foc_cpu_session/foc_cpu_session.h> #include <foc_cpu_session/client.h> #include <root/component.h> #include <util/avl_string.h> #include <util/misc_math.h> #include <assert.h> #include <stdlib.h> #include <omnios/thread.h> #include <omnios/sleep.h> #define PAGE_SIZE 4096 #define SHARED_MEMORY_SIZE (1*PAGE_SIZE) using namespace Genode; namespace Test { /** * Example pager class * * @return */ class Pager : public OmniOS::Thread { private: Signal_receiver _receiver; public: // ctor Pager() { PDBG("Pager constructed OK."); } Signal_receiver *signal_receiver() { return &_receiver; } void entry(); }; /** * Example backing store class - this one uses physical memory * */ class Physical_backing_store : public Signal_context { private: Rm_connection _rm; Genode::size_t _size; Dataspace_capability _ds; Dataspace_client _ds_client; unsigned long _iter; public: // ctor Physical_backing_store(Genode::size_t size): _rm(0,size), _ds(env()->ram_session()->alloc(SHARED_MEMORY_SIZE)), _ds_client(_ds), _iter(0) { _size = size; assert(_size > 0); } virtual ~Physical_backing_store() { } /** * Page fault handler. * */ void handle_fault() { Rm_session::State state = _rm.state(); if(state.type != Rm_session::READY) { if(__sync_fetch_and_add(&_iter,1) > 0) { PDBG("Entered PF handler again!!!\n"); return; } else PDBG("Entered PF handler for 1st time!\n"); } printf("Test::Physical_backing_store:: rm session state is %s, pf_addr=0x%lx\n", state.type == Rm_session::READ_FAULT ? "READ_FAULT" : state.type == Rm_session::WRITE_FAULT ? "WRITE_FAULT" : state.type == Rm_session::EXEC_FAULT ? "EXEC_FAULT" : "READY", state.addr); if (state.type == Rm_session::READY) return; try { try { /* print out the physical address */ { Genode::addr_t addr = _ds_client.phys_addr(); printf("Physical addr of dataspace:0x%lX\n",addr); } /* write something in for testing */ char * addr = (char*) env()->rm_session()->attach(_ds); assert(addr); addr[0] = 1; addr[1] = 2; addr[2] = 3; env()->rm_session()->detach((void*)addr); } catch(...) { PERR("Actual page allocation failed.\n"); } _rm.attach_at(_ds, state.addr & ~(PAGE_SIZE - 1)); PDBG("attached data space OK!\n"); } catch (Genode::Rm_session::Region_conflict) { PERR("Region conflict - this should not happen\n"); } catch (Genode::Rm_session::Out_of_metadata) { PERR("Out of meta data!\n"); } catch(...) { PERR("Something else caused attach to fail in fault handler.\n"); } return; } Rm_connection *rm() { return &_rm; } Dataspace_capability ds() { return _rm.dataspace(); } void connect_pager(Pager& _pager) { /* connect pager signal receiver to the fault handler */ _rm.fault_handler(_pager.signal_receiver()->manage(this)); } }; /** * Entry point for pager thread. * */ void Pager::entry() { while (true) { try { // THIS code BREAKS THINGS Signal signal = _receiver.wait_for_signal(); for (int i = 0; i < signal.num(); i++) { static_cast<Physical_backing_store *>(signal.context())->handle_fault(); } } catch (...) { PDBG("unexpected error while waiting for signal"); } } } class SharedMemory { private: void * _vaddr; Genode::Cancelable_lock _vaddr_lock; Test::Physical_backing_store _bs; /* create pager object */ static Test::Pager _pager; public: SharedMemory(): _vaddr(NULL),_bs(SHARED_MEMORY_SIZE) { PDBG("About to start the pager."); /* lets start the pager thread */ _pager.start(); /* allocate some backing store */ try { /* connect pager to fault handler */ _bs.connect_pager(_pager); /* attach to dataspace */ assert(!_vaddr); addr_t target_va = 0xfff000; /* look, we can use a specific VA address */ PDBG("About to attach to vaddr (0x%p)\n",_vaddr); _vaddr = env()->rm_session()->attach(_bs.ds(),SHARED_MEMORY_SIZE,0,true,target_va); PDBG("Attached dataspace to vaddr (0x%p)\n",_vaddr); assert(_vaddr); } catch(...) { PERR("Something failed in SharedMemory ctor.\n"); enter_kdebug("Unexpected condition."); } } void r_access(unsigned int tid) { assert(_vaddr); /* trigger read fault */ char* c = (char*) _vaddr; printf("Read (va=%p) [%d %d %d] (tid=%u)\n",c,c[0],c[1],c[2],tid); } void w_access() { assert(_vaddr); /* trigger write fault */ char* c = (char*) _vaddr; c[0]=2; c[1]=3; c[2]=4; } }; /* static initializers */ Test::Pager Test::SharedMemory::_pager; } int main() { Genode::printf("Test-pager-2 example. ;-))\n"); Test::SharedMemory shmem; Genode::printf("shmem created ok.\n"); Genode::sleep_forever(); return 0; } -- *Daniel G. Waddington Ph.D. C.Sci. **| **Samsung Information Systems America (SISA)* Principal Engineer/Research Manager, Systems Research Group, Computer Science Lab t: 408-544-5675 f: 408-544-5540 c: 408-890-0479 d.waddington@...60... <mailto:d.waddington@...60...> *****P*Please consider the environment before printing this email. This message is intended only for the named recipient(s) above and may contain confidential or privileged information or protected attorney work product. If you are not the intended recipient, any review, dissemination, distribution or copying is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this message and its attachments from your computer and dispose of all other copies or printouts. Thank you.

2 3

Third anniversary of the Genode OS Framework
by Norman Feske 28 Jul '11

28 Jul '11

Dear Genode Community, it has been almost three years ago when we published the first version of the Genode OS Framework. Since then, our ongoing commitment and dedication to bring forward this technology has proven our project to be sustaining and constantly evolving. Moreover, to our delight, the last year has shown that the potential behind our project receives increasing recognition by people outside the inner circle of the Genode and L4 communities. This gives us more than enough reasons to celebrate the 3rd anniversary of Genode together with you! Let's gather for a barbecue and a campfire on 19th of August, 6 pm near Moritzburger Str. 1 in Dresden http://maps.google.de/maps/ms?ie=UTF8&msa=0&msid=103318122554571178078.0004… We'd be happy about everyone who feels related to Genode to join us at the wonderful location nearby the river, enjoying both vegetarian and non-vegetarian barbecue and beverages. If you plan to attend, please leave a short note until 17th of August at info@...1... Cheers Norman -- Dr.-Ing. Norman Feske Genode Labs http://www.genode-labs.com · http://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

1 0

gmp on Genode + Fiasco.OC
by Sivaramakrishnan KC 27 Jul '11

27 Jul '11

Hi, While using gmp library (from libports) in a c project works fine, including gmp in a c++ project throws the following compiler errors. Any insight on what could be going wrong here? Program app/src/test-ml COMPILE main.o In file included from /home/kc/install/omnios/genode/ml/src/app/src/main.cc:1: /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:24:70: warning: iosfwd: No such file or directory /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:25:18: warning: cstdio: No such file or directory /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:51:40: warning: cstddef: No such file or directory In file included from /home/kc/install/omnios/genode/ml/src/app/src/main.cc:1: /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:538: error: 'std::FILE' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:542: error: expected ',' or '...' before '(' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:547: error: expected ',' or '...' before '(' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:624: error: 'size_t' has not been declared In file included from /home/kc/install/omnios/genode/ml/src/app/src/main.cc:1: /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:807: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:807: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:807: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:904: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:904: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:904: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1092: error: 'size_t' does not name a type /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1096: error: 'size_t' does not name a type /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1353: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1444: error: 'size_t' does not name a type /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1533: error: 'size_t' does not name a type /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1590: error: 'size_t' has not been declared /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:1790: error: 'size_t' does not name a type /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:2180: error: expected constructor, destructor, or type conversion before '&' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:2181: error: expected constructor, destructor, or type conversion before '&' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:2182: error: expected constructor, destructor, or type conversion before '&' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:2183: error: expected constructor, destructor, or type conversion before '&' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:2184: error: expected constructor, destructor, or type conversion before '&' token /home/kc/install/omnios/genode/libports/include/gmp/x86_32/gmp.h:2185: error: expected constructor, destructor, or type conversion before '&' token make[2]: *** [main.o] Error 1 make[1]: *** [test-ml.prg] Error 2 make: *** [gen_deps_and_build_targets] Error 2 Thanks kc

2 2

Simple custom pager
by Daniel Waddington 21 Jul '11

21 Jul '11

Hi, As a toy exercise I'm trying to write a very simple custom pager which simply allocates memory from RAM to handle page faults. When I try to handle the fault I get a region conflict exception. Can someone tell me why?? I think I am missing something fundamental here. Thanks Daniel ---- #include <base/printf.h> #include <base/sleep.h> #include <base/rpc_server.h> #include <cap_session/connection.h> #include <dataspace/client.h> #include <rom_session/connection.h> #include <rm_session/connection.h> #include <ram_session/connection.h> #include <root/component.h> #include <util/avl_string.h> #include <util/misc_math.h> #include <assert.h> #define PAGE_SIZE 4096 using namespace Genode; namespace Test { /** * Example pager class * * @return */ class Pager : public Thread<8192> { private: Signal_receiver _receiver; public: Signal_receiver *signal_receiver() { return &_receiver; } void entry(); }; /** * Example backing store class - this one uses physical memory * */ class Physical_backing_store : public Signal_context { private: Rm_connection _rm; size_t _size; public: // ctor Physical_backing_store(size_t size): _rm(0,_size) { _size = size; assert(_size > 0); } virtual ~Physical_backing_store() { } /** * Page fault handler. * */ void handle_fault() { Rm_session::State state = _rm.state(); printf("Test::Physical_backing_store:: rm session state is %s, pf_addr=0x%lx\n", state.type == Rm_session::READ_FAULT ? "READ_FAULT" : state.type == Rm_session::WRITE_FAULT ? "WRITE_FAULT" : state.type == Rm_session::EXEC_FAULT ? "EXEC_FAULT" : "READY", state.addr); if (state.type == Rm_session::READY) return; try { Dataspace_capability _ds; try { _ds = env()->ram_session()->alloc(PAGE_SIZE); } catch(...) { PERR("Actual page allocation failed.\n"); } _rm.attach_at(_ds, state.addr & ~(PAGE_SIZE - 1)); PDBG("attached data space OK!\n"); } catch (Genode::Rm_session::Region_conflict) { PERR("Region conflict - this should not happen\n"); } catch (Genode::Rm_session::Out_of_metadata) { PERR("Out of meta data!\n"); } catch(...) { PERR("Something else caused attach to fail in fault handler.\n"); } return; } Rm_connection *rm() { return &_rm; } Dataspace_capability ds() { return _rm.dataspace(); } void connect_pager(Pager& _pager) { /* connect pager signal receiver to the fault handler */ _rm.fault_handler(_pager.signal_receiver()->manage(this)); } }; /** * Entry point for pager thread. * */ void Pager::entry() { printf("Pager thread started OK.\n"); while (true) { try { Signal signal = _receiver.wait_for_signal(); for (int i = 0; i < signal.num(); i++) { static_cast<Physical_backing_store *>(signal.context())->handle_fault(); } } catch (...) { PDBG("unexpected error while waiting for signal"); } } } } int main() { Genode::printf("Test-pager example. ;-))\n"); Test::Pager _pager; /* start pager thread */ _pager.start(); /* create dataspace etc. */ try { enum { MANAGED_DS_SIZE = 64*1024*1024 }; Test::Physical_backing_store bs(MANAGED_DS_SIZE); /* connect pager to fault handler */ bs.connect_pager(_pager); /* attach to dataspace */ char * addr = (char*) env()->rm_session()->attach(bs.ds()); assert(addr); /* trigger read fault */ printf("!!!Triggering fault...\n"); printf("%c%c%c\n",addr[0],addr[1],addr[2]); printf("Fault handled OK.\n"); } catch(...) { PERR("Something failed ????.\n"); } printf("test-pager completed.\n"); Genode::sleep_forever(); return 0; }

3 6

Genode r161 + Fiasco.OC r36
by Daniel Waddington 21 Jul '11

21 Jul '11

Hi, Can someone test the test-lwip_httpsrv on this distribution? It used to work but I think there may now be an issue. Message "received IPC instead of IRQ" does not seem to healthy. Thanks Daniel int main(): --- create local services --- int main(): --- start init --- int main(): transferred 2943 MB to init int main(): --- init created, waiting for exit condition --- [init -> test-lwip_httpsrv] Starting ldso ... [init -> pci_drv] PCI driver started [init -> test-lwip_httpsrv] Starting application ... environ: 4058 [init -> gpxe_nic_drv] virtual Nic::Session_component* Nic::Root::_create_session(const char*): --- init DDE NIC [init -> gpxe_nic_drv] scan_pci(): Found: 00:03.0 1022:2000 (rev 40) IRQ 0a [init -> gpxe_nic_drv] probe_pci_device(): using driver pcnet32 [init -> gpxe_nic_drv] snprintf not implemented [init -> gpxe_nic_drv] virtual Nic::Session_component* Nic::Root::_create_session(const char*): number of devices: 1 received IPC instead of IRQ [init -> gpxe_nic_drv] void Nic::dde_tx_handler(): --- init rx_callbacks [init -> test-lwip_httpsrv] int main(): Create new socket ... [init -> test-lwip_httpsrv] int main(): Now, I will bind ... [init -> test-lwip_httpsrv] int main(): Now, I will listen... received IPC instead of IRQ [init -> test

2 1

set pager in foc
by Chen Tian - SISA 01 Jul '11

01 Jul '11

Hello, After the set_pager function of a thread is called through a cpu_session, the _pager of that thread is set and used when the actual platform thread starts. But there is only one thread (pager) to resolve all page faults for all threads. I think the pager mapping happened in platform_thread::start (platform_thread.cc:40-47). Can somebody please explain to me the meaning of this l4_task_map call? I suspect that "_remote_pager_cap" is corresponding to the global pager, but cannot find any evidence. Thanks a lot. Best, Chen

3 10

Rm_session::Out_of_memory.
by Chen Tian - SISA 30 Jun '11

30 Jun '11

Hello, I want to measure the thread creation time in Genode via Cpu_session create_thread, start and kill_thread interface. However, after sometime (around 139th thread creation), I always get a "Quota exceed! Amount=61440, size=4096, consumed=61440" error. And a message "C++ runtime: Genode::Rm_session::Out_of_memory" follows that. I expected all resources used by a thread should be released when "kill_thread" is called. This is apparently not the case. Can someone explain to me why this error happened and how I can adjust the Rm_sesion quota? Thanks, Best, Chen

2 1

Create servers on different core.
by Chen Tian - SISA 27 Jun '11

27 Jun '11

Hello, Without changing Genode, can I create a server on a different core than core 0? Also, is that possible to announce multiple services in a server and create multiple threads to provide different services? Thanks. Best, Chen

3 4

Create multiple processes.
by Chen Tian - SISA 17 Jun '11

17 Jun '11

Hi, I want to launch multiple Genode processes. One obvious way is to take advantage of init process. But it seems like all these init-created processes will share the same RM session (provided by Core) and hence the same pager. To allow each process to have its own region map, shall I write my own launching process or modify init ? Thanks. Best, Chen

3 5

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