AddressSanitizer run-time library. Not yet integrated with the compiler-rt build system, but can be built using the old makefile. See details in README.txt
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@145463 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/asan_linux.cc b/lib/asan/asan_linux.cc
new file mode 100644
index 0000000..752300b
--- /dev/null
+++ b/lib/asan/asan_linux.cc
@@ -0,0 +1,48 @@
+//===-- asan_linux.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 AddressSanitizer, an address sanity checker.
+//
+// Linux-specific details.
+//===----------------------------------------------------------------------===//
+
+#include "asan_internal.h"
+
+#include <sys/mman.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+extern char _DYNAMIC[];
+
+namespace __asan {
+
+void *AsanDoesNotSupportStaticLinkage() {
+ // This will fail to link with -static.
+ return &_DYNAMIC;
+}
+
+#ifdef ANDROID
+#define SYS_mmap2 __NR_mmap2
+#define SYS_write __NR_write
+#endif
+
+void *asan_mmap(void *addr, size_t length, int prot, int flags,
+ int fd, uint64_t offset) {
+# if __WORDSIZE == 64
+ return (void *)syscall(SYS_mmap, addr, length, prot, flags, fd, offset);
+# else
+ return (void *)syscall(SYS_mmap2, addr, length, prot, flags, fd, offset);
+# endif
+}
+
+ssize_t asan_write(int fd, const void *buf, size_t count) {
+ return (ssize_t)syscall(SYS_write, fd, buf, count);
+}
+
+} // namespace __asan