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Add PC tracing capability

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This adds the --trace_pc option to dump the PC after each instruction to a file
called trace.bin
This commit is contained in:
Olof Kindgren
2023-01-15 22:28:19 +01:00
parent 9bb2f95bf4
commit f0f2dba67f
4 changed files with 28 additions and 4 deletions
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9
bench/servant_tb.cpp
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@@ -1,3 +1,4 @@
#include <fcntl.h>
#include <stdint.h>
#include <signal.h>
@@ -110,6 +111,11 @@ int main(int argc, char **argv, char **env)
signal(SIGINT, INThandler);
int tf = 0;
const char *arg_trace_pc = Verilated::commandArgsPlusMatch("trace_pc=");
if (arg_trace_pc[0])
tf = open("trace.bin", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
vluint64_t timeout = 0;
const char *arg_timeout = Verilated::commandArgsPlusMatch("timeout=");
if (arg_timeout[0])
@@ -137,6 +143,8 @@ int main(int argc, char **argv, char **env)
} else {
do_gpio(&gpio_context, top->q);
}
if (tf && top->wb_clk && top->pc_vld)
write(tf, (void *)&top->pc_adr, 4);
if (timeout && (main_time >= timeout)) {
printf("Timeout: Exiting at time %lu\n", main_time);
done = true;
@@ -146,6 +154,7 @@ int main(int argc, char **argv, char **env)
main_time+=31.25;
}
close(tf);
if (tfp)
tfp->close();
exit(0);