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2011-02-28T17:36:50.087
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I was able to run 2 SystemC tests using the fork system call. I used the tutorial example on <a href="http://www.doulos.com/knowhow/systemc/tutorial/modules_and_processes/" rel="nofollow">doulos.com</a> and the <a href="http://code.google.com/p/googletest/" rel="nofollow">Google Test</a> framework. I was able to run the test twice, but I get an error printed out by the SystemC simulator about starting the test after calling sc_stop. However, regardless of the error, the simulator runs fine the second time around. <pre><code> SystemC 2.2.0 --- Feb 24 2011 15:01:50 Copyright (c) 1996-2006 by all Contributors ALL RIGHTS RESERVED Running main() from gtest_main.cc [==========] Running 2 tests from 1 test case. [----------] Global test environment set-up. [----------] 2 tests from systemc_test [ RUN ] systemc_test.test1 Time A B F 0 s 0 0 0 0 s 0 0 1 10 ns 0 1 1 20 ns 1 0 1 30 ns 1 1 0 SystemC: simulation stopped by user. [ OK ] systemc_test.test1 (1 ms) [ RUN ] systemc_test.test2 Error: (E546) sc_start called after sc_stop has been called In file: ../../../../src/sysc/kernel/sc_simcontext.cpp:1315 [ OK ] systemc_test.test2 (2 ms) [----------] 2 tests from systemc_test (3 ms total) [----------] Global test environment tear-down [==========] 2 tests from 1 test case ran. (3 ms total) [ PASSED ] 2 tests. [ OK ] systemc_test.test1 (3 ms) [ RUN ] systemc_test.test2 Time A B F 0 s 0 0 0 0 s 0 0 1 10 ns 0 1 1 20 ns 1 0 1 30 ns 1 1 0 SystemC: simulation stopped by user. [ OK ] systemc_test.test2 (1 ms) [----------] 2 tests from systemc_test (4 ms total) [----------] Global test environment tear-down [==========] 2 tests from 1 test case ran. (4 ms total) [ PASSED ] 2 tests. [ OK ] systemc_test.test2 (1 ms) [----------] 2 tests from systemc_test (4 ms total) [----------] Global test environment tear-down [==========] 2 tests from 1 test case ran. (4 ms total) [ PASSED ] 2 tests. </code></pre> UPDATE: Code sample as requested: <pre><code>// main_1.cxx #include "systemc.h" #include "stim.hxx" #include "exor2.hxx" #include "mon.hxx" //#include <pthread.h> #include <sys/types.h> #include <sys/wait.h> void run_1() { sc_signal<bool> ASig, BSig, FSig; sc_clock TestClk("TestClock", 10, SC_NS,0.5); stim* Stim1 = new stim("Stimulus1_1"); Stim1->A(ASig); Stim1->B(BSig); Stim1->Clk(TestClk); exor2* DUT = new exor2("exor2_1"); DUT->A(ASig); DUT->B(BSig); DUT->F(FSig); mon* Monitor1 = new mon("Monitor_1"); Monitor1->A(ASig); Monitor1->B(BSig); Monitor1->F(FSig); Monitor1->Clk(TestClk); Stim1->run(); delete Stim1; delete DUT; delete Monitor1; } bool sc_main_1() { //int rc; //pthread_t thread; //if( (rc = pthread_create( &thread, NULL, &run_1, NULL)) ) //{ // printf("Thread creation failed: %d\n", rc); //}; //pthread_join(thread, NULL); int pid = fork(); if(pid == 0) { run_1(); }; waitpid(pid, NULL, 0); return true; }; // main_2.cxx #include "systemc.h" #include "stim.hxx" #include "exor2.hxx" #include "mon.hxx" //#include <pthread.h> #include <sys/types.h> #include <sys/wait.h> void run_2() { sc_signal<bool> ASig, BSig, FSig; sc_clock TestClk("TestClock", 10, SC_NS,0.5); stim* Stim1 = new stim("Stimulus1_2"); Stim1->A(ASig); Stim1->B(BSig); Stim1->Clk(TestClk); exor2* DUT = new exor2("exor2_2"); DUT->A(ASig); DUT->B(BSig); DUT->F(FSig); mon* Monitor1 = new mon("Monitor_2"); Monitor1->A(ASig); Monitor1->B(BSig); Monitor1->F(FSig); Monitor1->Clk(TestClk); Stim1->run(); delete Stim1; delete DUT; delete Monitor1; } bool sc_main_2() { //int rc; //pthread_t thread; //if( (rc = pthread_create( &thread, NULL, &run_1, NULL)) ) //{ // printf("Thread creation failed: %d\n", rc); //}; //pthread_join(thread, NULL); int pid = fork(); if(pid == 0) { run_2(); }; waitpid(pid, NULL, 0); return true; }; // main.cxx #include "systemc.h" #include "gtest/gtest.h" extern bool sc_main_1(); extern bool sc_main_2(); TEST(systemc_test, test1) { EXPECT_TRUE(sc_main_1()); }; TEST(systemc_test, test2) { EXPECT_TRUE(sc_main_2()); }; int sc_main(int argc, char* argv[]) { std::cout << "Running main() from gtest_main.cc\n"; testing::InitGoogleTest(&argc, argv); RUN_ALL_TESTS(); return 0; } // stim.hxx #ifndef stim_hxx #define stim_hxx #include "systemc.h" SC_MODULE(stim) { sc_out<bool> A, B; sc_in<bool> Clk; void StimGen() { A.write(false); B.write(false); wait(); A.write(false); B.write(true); wait(); A.write(true); B.write(false); wait(); A.write(true); B.write(true); wait(); sc_stop(); } SC_CTOR(stim) { SC_THREAD(StimGen); sensitive << Clk.pos(); } bool run() { sc_start(); // run forever return true; }; }; #endif // exor2.hxx #ifndef exor_hxx #define exor_hxx #include "systemc.h" #include "nand2.hxx" SC_MODULE(exor2) { sc_in<bool> A, B; sc_out<bool> F; nand2 n1, n2, n3, n4; sc_signal<bool> S1, S2, S3; SC_CTOR(exor2) : n1("N1"), n2("N2"), n3("N3"), n4("N4") { n1.A(A); n1.B(B); n1.F(S1); n2.A(A); n2.B(S1); n2.F(S2); n3.A(S1); n3.B(B); n3.F(S3); n4.A(S2); n4.B(S3); n4.F(F); } }; #endif // mon.hxx #ifndef mon_hxx #define mon_hxx #include "systemc.h" #include <iomanip> #include <iostream> using namespace std; SC_MODULE(mon) { sc_in<bool> A,B,F; sc_in<bool> Clk; void monitor() { cout << setw(10) << "Time"; cout << setw(2) << "A" ; cout << setw(2) << "B"; cout << setw(2) << "F" << endl; while (true) { cout << setw(10) << sc_time_stamp(); cout << setw(2) << A.read(); cout << setw(2) << B.read(); cout << setw(2) << F.read() << endl; wait(); // wait for 1 clock cycle } } SC_CTOR(mon) { SC_THREAD(monitor); sensitive << Clk.pos(); } }; #endif </code></pre>
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1. POUsing existing unit test frameworks with SystemC
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1. COThanks for the reply! Could you provide some systemC code with the Google Test framework?
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2. COMaybe you can use processes instead of threads so that the systemc simulator doesn't complain.
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