initial code repo

[stor4nfv.git] / src / ceph / src / test / on_exit.cc

diff --git a/src/ceph/src/test/on_exit.cc b/src/ceph/src/test/on_exit.cc
new file mode 100644 (file)
index 0000000..50721ac
--- /dev/null
+++ b/src/ceph/src/test/on_exit.cc
@@ -0,0 +1,115 @@
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "include/on_exit.h"
+#include "include/assert.h"
+
+#ifndef MAP_ANONYMOUS
+# ifdef MAP_ANON
+#  define MAP_ANONYMOUS MAP_ANON
+# else
+// cppcheck-suppress preprocessorErrorDirective
+#  error "Don't know how to create anonymous mmap"
+# endif
+#endif
+
+static int func_scope_val;
+
+static void add(void *incp)
+{
+  func_scope_val += *((int*)incp);
+}
+
+static void func_scope(void)
+{
+  OnExitManager mgr;
+
+  int *inc_1 = (int*)malloc(sizeof(*inc_1));
+  *inc_1 = 5;
+  mgr.add_callback(add, inc_1);
+
+  int *inc_2 = (int*)malloc(sizeof(*inc_2));
+  *inc_2 = 3;
+  mgr.add_callback(add, inc_2);
+}
+
+// shared between processes
+static int *shared_val;
+
+#define MAIN_SCOPE_VAL 0x1111111
+static OnExitManager main_scope_mgr;
+static void main_scope_cb(void *val)
+{
+  *shared_val = *((int*)val);
+}
+
+#define EXIT_FUNC_VAL 0x22222222
+static OnExitManager exit_func_mgr;
+static void exit_func_cb(void *val)
+{
+  *shared_val = *((int*)val);
+}
+
+static void call_exit()
+{
+  exit(3);
+}
+
+int main(int argc, char **argv)
+{
+  // test basic function scope behavior
+  assert(func_scope_val == 0);
+  func_scope();
+  assert(func_scope_val == 8);
+
+  // shared mem for exit tests
+  shared_val = (int*)mmap(NULL, sizeof(int),
+      PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
+  assert(shared_val != MAP_FAILED);
+
+  // test normal exit returning from main
+  *shared_val = 0;
+  int pid = fork();
+  assert(pid >= 0);
+  if (pid) {
+    int status;
+    int ret = waitpid(pid, &status, 0);
+    assert(ret == pid); // should be our child
+    assert(status == 0);
+    assert(*shared_val == MAIN_SCOPE_VAL);
+  } else {
+    // child adds a callback to the static scope callback manager and then
+    // exits by returning from main. The parent checks the value after the
+    // child exits via the memory map.
+    assert(*shared_val == 0);
+    int *new_val = (int*)malloc(sizeof(*new_val));
+    *new_val = MAIN_SCOPE_VAL;
+    main_scope_mgr.add_callback(main_scope_cb, new_val);
+    return 0;
+  }
+
+  // test exit via exit()
+  *shared_val = 0;
+  pid = fork();
+  assert(pid >= 0);
+  if (pid) {
+    int status;
+    int ret = waitpid(pid, &status, 0);
+    assert(ret == pid); // should be our child
+    assert(WEXITSTATUS(status) == 3);
+    assert(*shared_val == EXIT_FUNC_VAL);
+  } else {
+    // child adds a callback to the static scope callback manager and then
+    // exits via exit().
+    assert(*shared_val == 0);
+    int *new_val = (int*)malloc(sizeof(*new_val));
+    *new_val = EXIT_FUNC_VAL;
+    exit_func_mgr.add_callback(exit_func_cb, new_val);
+    call_exit();
+    ceph_abort();
+  }
+
+  return 0;
+}