util: add m5_fail op.

Used as a command in full-system scripts helps the user ensure the benchmarks have finished successfully.

For example, one can use:

    /path/to/benchmark args || /sbin/m5 fail 1

and thus ensure gem5 will exit with an error if the benchmark fails.

2 files changed, 8 insertions, 0 deletions

diff --git a/src/sim/pseudo_inst.cc b/src/sim/pseudo_inst.cc
index aafa5672b..a57bdb2ce 100644
--- a/src/sim/pseudo_inst.cc
+++ b/src/sim/pseudo_inst.cc
@@ -219,6 +219,13 @@ m5exit(ThreadContext *tc, Tick delay)
 }
 
 void
+m5fail(ThreadContext *tc, Tick delay, uint64_t code)
+{
+    Tick when = curTick() + delay * SimClock::Int::ns;
+    exitSimLoop("m5_fail instruction encountered", code, when);
+}
+
+void
 loadsymbol(ThreadContext *tc)
 {
     if (!FullSystem)
diff --git a/src/sim/pseudo_inst.hh b/src/sim/pseudo_inst.hh
index 4a6493a66..efcd44a69 100644
--- a/src/sim/pseudo_inst.hh
+++ b/src/sim/pseudo_inst.hh
@@ -54,6 +54,7 @@ uint64_t initParam(ThreadContext *xc);
 uint64_t rpns(ThreadContext *tc);
 void wakeCPU(ThreadContext *tc, uint64_t cpuid);
 void m5exit(ThreadContext *tc, Tick delay);
+void m5fail(ThreadContext *tc, Tick delay, uint64_t code);
 void resetstats(ThreadContext *tc, Tick delay, Tick period);
 void dumpstats(ThreadContext *tc, Tick delay, Tick period);
 void dumpresetstats(ThreadContext *tc, Tick delay, Tick period);