wire this up

tools/kilobench/kilobench.cpp

Index: tools/kilobench/kilobench.cpp
diff --git a/tools/kilobench/kilobench.cpp b/tools/kilobench/kilobench.cpp
index 438e582324fb2e8c97f1da061e7d9a3f8760d870..d3553f2ac604165000966c8d1f8fa2a9addb3162 100644
--- a/tools/kilobench/kilobench.cpp
+++ b/tools/kilobench/kilobench.cpp
@@ -8,6 +8,7 @@
 #include "GrCaps.h"
 #include "GrContextFactory.h"
 #include "Benchmark.h"
+#include "ResultsWriter.h"
 #include "SkCommandLineFlags.h"
 #include "SkOSFile.h"
 #include "SkStream.h"
@@ -18,6 +19,11 @@
 #include "VisualSKPBench.h"
 #include "gl/GrGLDefines.h"
 
+// posix only for now
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
 /*
  * This is an experimental GPU only benchmarking program.  The initial implementation will only
  * support SKPs.
@@ -327,7 +333,12 @@ static SkString humanize(double ms) {
 }
 #define HUMANIZE(ms) humanize(ms).c_str()
 
-void benchmark_inner_loop(Benchmark* bench, GrContextFactory* ctxFactory) {
+void benchmark_inner_loop(Benchmark* bench) {
+    SkAutoTDelete<GrContextFactory> ctxFactory;
+
+    GrContextOptions grContextOpts;
+    ctxFactory.reset(new GrContextFactory(grContextOpts));
+
     SkTArray<double> samples;
     GPUTarget target;
     SkAssertResult(target.init(bench, ctxFactory, false,
@@ -374,11 +385,6 @@ void benchmark_inner_loop(Benchmark* bench, GrContextFactory* ctxFactory) {
 } // namespace kilobench
 
 int kilobench_main() {
-    SkAutoTDelete<GrContextFactory> ctxFactory;
-
-    GrContextOptions grContextOpts;
-    ctxFactory.reset(new GrContextFactory(grContextOpts));
-
     kilobench::BenchmarkStream benchStream;
 
     SkDebugf("loops\tmin\tmedian\tmean\tmax\tstddev\t%-*s\tconfig\tbench\n",
@@ -386,12 +392,17 @@ int kilobench_main() {
 
     while (Benchmark* b = benchStream.next()) {
         SkAutoTDelete<Benchmark> bench(b);
-        kilobench::benchmark_inner_loop(bench.get(), ctxFactory.get());
-    }
 
-    // Make sure we clean up the global GrContextFactory here, otherwise we might race with the
-    // SkEventTracer destructor
-    ctxFactory.reset(nullptr);
+        // We fork off a new process to setup the grcontext and run the test while we wait
+        int childPid = fork();
+        if (childPid) {
+            int status;
+            waitpid(childPid, &status, 0);
+        } else {
+            kilobench::benchmark_inner_loop(bench.get());
+            return 0;
+        }
+    }
     return 0;
 }