tsan: add java interface implementation stub

llvm-svn: 170681

compiler-rt/lib/tsan/lit_tests/java_race.cc

@@ -0,0 +1,37 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdlib.h>
+
+extern "C" {
+typedef unsigned long jptr;  // NOLINT
+void __tsan_java_init(jptr heap_begin, jptr heap_size);
+int  __tsan_java_fini();
+void __tsan_java_alloc(jptr ptr, jptr size);
+void __tsan_java_free(jptr ptr, jptr size);
+void __tsan_java_move(jptr src, jptr dst, jptr size);
+void __tsan_java_mutex_lock(jptr addr);
+void __tsan_java_mutex_unlock(jptr addr);
+void __tsan_java_mutex_read_lock(jptr addr);
+void __tsan_java_mutex_read_unlock(jptr addr);
+}
+
+void *Thread(void *p) {
+  *(int*)p = 42;
+  return 0;
+}
+
+int main() {
+  int const kHeapSize = 1024 * 1024;
+  void *jheap = malloc(kHeapSize);
+  __tsan_java_init((jptr)jheap, kHeapSize);
+  const int kBlockSize = 16;
+  __tsan_java_alloc((jptr)jheap, kBlockSize);
+  pthread_t th;
+  pthread_create(&th, 0, Thread, jheap);
+  *(int*)jheap = 43;
+  pthread_join(th, 0);
+  __tsan_java_free((jptr)jheap, kBlockSize);
+  return __tsan_java_fini();
+}
+
+// CHECK: WARNING: ThreadSanitizer: data race

compiler-rt/lib/tsan/rtl/tsan_interface_java.cc

@@ -0,0 +1,46 @@
+//===-- tsan_interface_java.cc --------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of ThreadSanitizer (TSan), a race detector.
+//
+//===----------------------------------------------------------------------===//
+
+#include "tsan_interface_java.h"
+#include "tsan_rtl.h"
+
+using namespace __tsan;  // NOLINT
+
+void __tsan_java_init(jptr heap_begin, jptr heap_size) {
+}
+
+int  __tsan_java_fini() {
+  return 0;
+}
+
+void __tsan_java_alloc(jptr ptr, jptr size) {
+}
+
+void __tsan_java_free(jptr ptr, jptr size) {
+}
+
+void __tsan_java_move(jptr src, jptr dst, jptr size) {
+}
+
+void __tsan_java_mutex_lock(jptr addr) {
+}
+
+void __tsan_java_mutex_unlock(jptr addr) {
+}
+
+void __tsan_java_mutex_read_lock(jptr addr) {
+}
+
+void __tsan_java_mutex_read_unlock(jptr addr) {
+}
+

compiler-rt/lib/tsan/rtl/tsan_interface_java.h

@@ -23,7 +23,6 @@ extern "C" {
 
 typedef unsigned long jptr;  // NOLINT
 
-
 // Must be called before any other callback from Java.
 void __tsan_java_init(jptr heap_begin, jptr heap_size) INTERFACE_ATTRIBUTE;
 // Must be called when the application exits.