From ea2f3bffca04ebb3fd91949ae5f0c5b1c6ff015f Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Tue, 14 Oct 2014 09:32:45 +0000
Subject: tsan: refactor atexit handling The current handling (manual execution
 of atexit callbacks) is overly complex and leads to constant problems due to
 mutual ordering of callbacks. Instead simply wrap callbacks into our wrapper
 to establish the necessary synchronization. Fixes issue
 https://code.google.com/p/thread-sanitizer/issues/detail?id=80

llvm-svn: 219675
---
 compiler-rt/test/tsan/dlclose.cc | 56 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 compiler-rt/test/tsan/dlclose.cc

(limited to 'compiler-rt/test/tsan/dlclose.cc')

diff --git a/compiler-rt/test/tsan/dlclose.cc b/compiler-rt/test/tsan/dlclose.cc
new file mode 100644
index 00000000000..5325d6f0f8b
--- /dev/null
+++ b/compiler-rt/test/tsan/dlclose.cc
@@ -0,0 +1,56 @@
+// RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so
+// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+
+// Test case for
+// https://code.google.com/p/thread-sanitizer/issues/detail?id=80
+
+#ifdef BUILD_SO
+
+#include <stdio.h>
+
+extern "C"
+void sofunc() {
+  fprintf(stderr, "HELLO FROM SO\n");
+}
+
+#else  // BUILD_SO
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <string>
+
+void *lib;
+void *lib2;
+
+struct Closer {
+  ~Closer() {
+    dlclose(lib);
+    fprintf(stderr, "CLOSED SO\n");
+  }
+};
+static Closer c;
+
+int main(int argc, char *argv[]) {
+  lib = dlopen((std::string(argv[0]) + std::string("-so.so")).c_str(),
+      RTLD_NOW|RTLD_NODELETE);
+  if (lib == 0) {
+    printf("error in dlopen: %s\n", dlerror());
+    return 1;
+  }
+  void *f = dlsym(lib, "sofunc");
+  if (f == 0) {
+    printf("error in dlsym: %s\n", dlerror());
+    return 1;
+  }
+  ((void(*)())f)();
+  return 0;
+}
+
+#endif  // BUILD_SO
+
+// CHECK: HELLO FROM SO
+// CHECK-NOT: Inconsistency detected by ld.so
+// CHECK: CLOSED SO
+
-- 
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