Squashed 'gctest/minitrace/' content from commit f4dc532

git-subtree-dir: gctest/minitrace
git-subtree-split: f4dc5329360a7a07959285c50f31025a12ae3a14

1 files changed, 60 insertions, 0 deletions

diff --git a/minitrace_test_mt.cpp b/minitrace_test_mt.cpp
new file mode 100644
index 0000000..899a193
--- /dev/null
+++ b/minitrace_test_mt.cpp
@@ -0,0 +1,60 @@
+// Test minitrace with multiple threads.
+
+#include <inttypes.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+#include "minitrace.h"
+
+// Does some meaningless work.
+int work(int cycles) {
+	int a = cycles;
+	for (int i = 0; i < cycles; i++) {
+		a ^= 373;
+		a = (a << 13) | (a >> (32 - 13));
+	}
+	return a;
+}
+
+void *worker_thread(void *param) {
+	int id = (int)(intptr_t)param;
+	char temp[256]; sprintf(temp, "Worker Thread %i", id);
+	MTR_META_THREAD_NAME(temp);
+	int x = 0;
+	for (int i = 0; i < 32; i++) {
+		MTR_BEGIN_I(__FILE__, "Worker", "ID", id);
+		x += work((rand() & 0x7fff) * 1000);
+		MTR_END(__FILE__, "Worker");
+	}
+	return (void *)(intptr_t)x;
+}
+
+void phase2() {
+	for (int i = 0; i < 10000; i++) {
+		MTR_BEGIN_FUNC();
+		MTR_END_FUNC();
+	}
+}
+
+int main() {
+	int i;
+	mtr_init("mt_trace.json");
+	MTR_META_PROCESS_NAME("Multithreaded Test");
+	MTR_META_THREAD_NAME("Main Thread");
+	MTR_BEGIN_FUNC();
+	#define NUMT 8
+	pthread_t threads[NUMT];
+	for (i = 0; i < NUMT; i++) {
+		pthread_create(&threads[i], 0, &worker_thread, (void *)(intptr_t)i);
+	}
+	for (i = 0; i < NUMT; i++) {
+		pthread_join(threads[i], 0);
+	}
+	phase2();
+
+	MTR_END_FUNC();
+	mtr_shutdown();
+	return 0;
+}