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Philipp A Hartmann

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Philipp A Hartmann last won the day on August 23

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About Philipp A Hartmann

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    Duisburg, DE

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  1. Philipp A Hartmann

    Possible Bug/Regression in SystemC 2.3.2: Race Condition

    Hi Ameya, thanks for testing. As said before, unfortunately I cannot reproduce this on my end. I would need more details on the current behavior: The backtrace looks like there is something broken during model teardown. Have you seen other cases? Are all simulations with processes hanging in a similar way? (e.g. can you provide a full regression result?) Greetings from Duisburg, Philipp
  2. Philipp A Hartmann

    Possible Bug/Regression in SystemC 2.3.2: Race Condition

    Hi Ameya, I currently don't have access to such new Linux platforms, but I may have a suspicion about a potential root cause. Can you please check, if it helps to change the sc_process_b::delete_process function in src/sysc/kernel/sc_process.cpp as follows: // if ( this != sc_get_current_process_b() ) if ( NULL == sc_get_current_process_b() ) Thanks and Greetings from Duisburg, Philipp
  3. This example still uses the positional binding feature of SystemC, which is deprecated as per IEEE Std. 1666 (see Annex C (h), emphasis mine): hth, Philipp
  4. The full data length is independent of the word length. The rules for DATAWORD are defined by the standard as follows (see 14.20.3): From your example below, you seem to be using four byte word, so "unsigned" (or uint32_t) could be a used as a DATAWORD parameter.
  5. Hi Khushi, the best is to look up the definition in the IEEE 1666-2011 standard, section 14.20(.3). The different conversion functions have different constraints associated with them, allowing for more performant implementations for the _word, _aligned, and _single specializations. The _generic one covers arbitrary cases. The DATAWORD template parameter allows for optimizations as well (and endianness is always specific to the notion of a word). Hope that helps, Philipp
  6. Philipp A Hartmann

    SystemC Simulation Semantics and Scheduler Steps

    Hi Ivan, instead of referring to the very old 2.01. LRM, I suggest to check the IEEE Std. 1666-2011 for SystemC, which could can download at no cost (sponsored by Accellera) via https://standards.ieee.org/findstds/standard/1666-2011.html. This document includes the normative answers to all of your questions. Yes, see section 5.10.8 of the aforementioned standard. Kind of, yes. This is called "time out", see section 4.2(.1) of the standard. The order to execution of processes in the runnable queue is entirely implementation-defined. See section 4.2.1.2. Hope that helps, Philipp Disclaimer: I haven't checked all of your post for correctness and focused on the questions instead. .
  7. Hi Sumit, I re-checked the LLVM issue and it now refers to C++ CWG issue #7 (http://www.open-std.org/Jtc1/sc22/wg21/docs/cwg_closed.html#7), which clearly describes our situation here and shows that the current implementation of tlm_req_rsp_channel<...> is invalid C++ in SystemC (even though only Clang rejects it so far). Without changing the inheritance pattern, the only fix would be to add "friend" declarations to all (indirect) virtual base classes of tlm_put_get_impl<...>, including sc_interface. This is not an option, so I think the internal implementation of the tlm_req_rsp_channel<...> needs to be refactored to avoid the private virtual inheritance. I have opened an issue in the SystemC Language WG bug tracker for this. Greetings from Duisburg, Philipp
  8. Philipp A Hartmann

    Build error with 2.3.2

    SystemC 2.3.2 has been tested successfully with C++03, C++11, C++14 (and even C++17) with various compilers. As mentioned in this thread, the selected C++ standard needs to match between the library build and the application build. This is enforced by the linker error you see. If you continue to run into these errors, make sure to build the SystemC library with the matching C++ standard selection compared to your application (see INSTALL or cmake/INSTALL_USING_CMAKE how to do that).
  9. Philipp A Hartmann

    Build error with 2.3.2

    The 'CMAKE_CXX_STANDARD' is specific to cmake. When you use automake/configure, you can configure the build by passing the '-std=c++11' flag directly to the configure call: ../configure ... 'CXXFLAGS=-std=c++11' Hope that helps, Philipp
  10. Philipp A Hartmann

    Build error with 2.3.2

    SystemC 2.3.2 works fine with C++03, you just need to configure the C++ standard consistently between your application and the library build. In the (experimental) SystemC Cmake build setup, the selection always defaults to C++03, regardless of the default of the compiler. In your application build, you might not explicitly set the C++ standard on the command-line, giving you a different default version from your compiler. The behavior of the SystemC CMake setup could be improved here. Greetings from Duisburg, Philipp
  11. Philipp A Hartmann

    make check return fail

    Hi all, you may want to try the attached sc_semaphore.h (requires C++11 to avoid the use of sem_init on MacOS). Hope that helps, Philipp sc_host_semaphore.h
  12. Philipp A Hartmann

    Passing event to SC_CTHREAD macro

    It should be fine to use wait(n) in SC_THREADs (with static sensitivity) as well?
  13. Philipp A Hartmann

    Passing event to SC_CTHREAD macro

    For your particular use case, you can just pass in the clock signal directly: SC_CTHREAD(test_cthread, clkgen); // posedge by default for CTHREADs If you need a negedge triggered process, you can also write the equivalent SC_THREAD instead: SC_THREAD(test_cthread); sensitive << clkgen.negedge_event(); dont_initialize(); Allowing plain events for CTHREAD sensitivity was probably just never needed.
  14. Philipp A Hartmann

    reset method or thread

    There is an example for catching and re-throwing an sc_unwind_exception in IEEE 1666-2011, clause 5.6.6.6. Hope that helps, Philipp
  15. Philipp A Hartmann

    C++ class object bringing into systemC Hierarchy

    Hi all, Both sc_get_current_process_b() and get_parent() are non-standard functions that may or may not be supported by (future) versions of your SystemC implementation. I recommend to only use standard IEEE 1666-2011 APIs instead: x sc_core::sc_get_current_process_handle().get_parent_object()->name() x sc_core::sc_get_current_process_handle().name() Greetings from Duisburg, Philipp
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