aboutsummaryrefslogtreecommitdiffstats
path: root/lib/tsan/benchmarks/mini_bench_shared.cpp
diff options
context:
space:
mode:
authorDimitry Andric <dim@FreeBSD.org>2019-10-23 17:52:22 +0000
committerDimitry Andric <dim@FreeBSD.org>2019-10-23 17:52:22 +0000
commit3a1720af1d7f43edc5b214cde0be11bfb94d077e (patch)
tree029e0ff2d5e3c0eaf2405fd8e669555fdf5e1297 /lib/tsan/benchmarks/mini_bench_shared.cpp
parent8f3cadc28cb2bb9e8f9d69eeaaea1f57f2f7b2ab (diff)
downloadsrc-vendor/compiler-rt.tar.gz
src-vendor/compiler-rt.zip
Vendor import of stripped compiler-rt trunk r375505, the last commitvendor/compiler-rt/compiler-rt-trunk-r375505vendor/compiler-rt
before the upstream Subversion repository was made read-only, and the LLVM project migrated to GitHub: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375505
Notes
Notes: svn path=/vendor/compiler-rt/dist/; revision=353944 svn path=/vendor/compiler-rt/compiler-rt-r375505/; revision=353945; tag=vendor/compiler-rt/compiler-rt-trunk-r375505
Diffstat (limited to 'lib/tsan/benchmarks/mini_bench_shared.cpp')
-rw-r--r--lib/tsan/benchmarks/mini_bench_shared.cpp51
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/tsan/benchmarks/mini_bench_shared.cpp b/lib/tsan/benchmarks/mini_bench_shared.cpp
new file mode 100644
index 000000000000..f9b9f42f78a4
--- /dev/null
+++ b/lib/tsan/benchmarks/mini_bench_shared.cpp
@@ -0,0 +1,51 @@
+// Mini-benchmark for tsan: shared memory reads.
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+int len;
+int *a;
+const int kNumIter = 1000;
+
+__attribute__((noinline))
+void Run(int idx) {
+ for (int i = 0, n = len; i < n; i++)
+ if (a[i] != i) abort();
+}
+
+void *Thread(void *arg) {
+ long idx = (long)arg;
+ printf("Thread %ld started\n", idx);
+ for (int i = 0; i < kNumIter; i++)
+ Run(idx);
+ printf("Thread %ld done\n", idx);
+ return 0;
+}
+
+int main(int argc, char **argv) {
+ int n_threads = 0;
+ if (argc != 3) {
+ n_threads = 4;
+ len = 1000000;
+ } else {
+ n_threads = atoi(argv[1]);
+ assert(n_threads > 0 && n_threads <= 32);
+ len = atoi(argv[2]);
+ }
+ printf("%s: n_threads=%d len=%d iter=%d\n",
+ __FILE__, n_threads, len, kNumIter);
+ a = new int[len];
+ for (int i = 0, n = len; i < n; i++)
+ a[i] = i;
+ pthread_t *t = new pthread_t[n_threads];
+ for (int i = 0; i < n_threads; i++) {
+ pthread_create(&t[i], 0, Thread, (void*)i);
+ }
+ for (int i = 0; i < n_threads; i++) {
+ pthread_join(t[i], 0);
+ }
+ delete [] t;
+ delete [] a;
+ return 0;
+}