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-rw-r--r--lib/tsan/benchmarks/func_entry_exit.cpp20
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/tsan/benchmarks/func_entry_exit.cpp b/lib/tsan/benchmarks/func_entry_exit.cpp
new file mode 100644
index 000000000000..5e0ba1d6981b
--- /dev/null
+++ b/lib/tsan/benchmarks/func_entry_exit.cpp
@@ -0,0 +1,20 @@
+// Synthetic benchmark for __tsan_func_entry/exit (spends ~75% there).
+
+void foo(bool x);
+
+int main() {
+ volatile int kRepeat1 = 1 << 30;
+ const int kRepeat = kRepeat1;
+ for (int i = 0; i < kRepeat; i++)
+ foo(false);
+}
+
+__attribute__((noinline)) void bar(volatile bool x) {
+ if (x)
+ foo(x);
+}
+
+__attribute__((noinline)) void foo(bool x) {
+ if (__builtin_expect(x, false))
+ bar(x);
+}