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Examples: Add +trace flag at runtime

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This commit is contained in:
Wilson Snyder
2017-11-05 06:51:29 -05:00
parent 6edaef9598
commit dfd22b2b07
4 changed files with 25 additions and 15 deletions
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examples/tracing_c/sim_main.cpp
+12 -7
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@@ -41,14 +41,19 @@ int main(int argc, char** argv, char** env) {
// Construct the Verilated model, from Vtop.h generated from Verilating "top.v"
Vtop* top = new Vtop; // Or use a const unique_ptr, or the VL_UNIQUE_PTR wrapper
// If verilator was invoked with --trace, open trace
#if VM_TRACE
Verilated::traceEverOn(true); // Verilator must compute traced signals
VL_PRINTF("Enabling waves into logs/vlt_dump.vcd...\n");
VerilatedVcdC* tfp = new VerilatedVcdC;
top->trace(tfp, 99); // Trace 99 levels of hierarchy
mkdir("logs", 0777);
tfp->open("logs/vlt_dump.vcd"); // Open the dump file
// If verilator was invoked with --trace argument,
// and if at run time passed the +trace argument, turn on tracing
VerilatedVcdC* tfp = NULL;
const char* flag = Verilated::commandArgsPlusMatch("trace");
if (flag && 0==strcmp(flag, "+trace")) {
Verilated::traceEverOn(true); // Verilator must compute traced signals
VL_PRINTF("Enabling waves into logs/vlt_dump.vcd...\n");
tfp = new VerilatedVcdC;
top->trace(tfp, 99); // Trace 99 levels of hierarchy
mkdir("logs", 0777);
tfp->open("logs/vlt_dump.vcd"); // Open the dump file
}
#endif
// Set some inputs