[PATCH] [lsan] Add a stress test.
Sergey Matveev
earthdok at google.com
Thu Aug 22 06:09:14 PDT 2013
Hi kcc,
http://llvm-reviews.chandlerc.com/D1473
Files:
lib/lsan/lit_tests/TestCases/high_allocator_contention.cc
Index: lib/lsan/lit_tests/TestCases/high_allocator_contention.cc
===================================================================
--- /dev/null
+++ lib/lsan/lit_tests/TestCases/high_allocator_contention.cc
@@ -0,0 +1,46 @@
+// A benchmark that executes malloc/free pairs in parallel.
+// Usage: ./a.out number_of_threads total_number_of_allocations
+// RUN: %clangxx_lsan %s -o %t
+// RUN: %t 5 1000000 2>&1
+#include <assert.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+int num_threads;
+int total_num_alloc;
+
+pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+bool go = false;
+
+void *thread_fun(void *) {
+ pthread_mutex_lock(&mutex);
+ while (!go) pthread_cond_wait(&cond, &mutex);
+ pthread_mutex_unlock(&mutex);
+ for (int i = 0; i < total_num_alloc / num_threads; i++) {
+ void *p = malloc(10);
+ __asm__ __volatile__("" : : "r"(p) : "memory");
+ free((void *)p);
+ }
+ return 0;
+}
+
+int main(int argc, char** argv) {
+ assert(argc == 3);
+ num_threads = atoi(argv[1]);
+ assert(num_threads > 0);
+ total_num_alloc = atoi(argv[2]);
+ assert(total_num_alloc > 0);
+ pthread_t tid[num_threads];
+ printf("%d threads, %d allocations in each\n", num_threads,
+ total_num_alloc / num_threads);
+ for (int i = 0; i < num_threads; i++)
+ pthread_create(&tid[i], 0, thread_fun, 0);
+ pthread_mutex_lock(&mutex);
+ go = true;
+ pthread_cond_broadcast(&cond);
+ pthread_mutex_unlock(&mutex);
+ for (int i = 0; i < num_threads; i++) pthread_join(tid[i], 0);
+ return 0;
+}
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