1 files changed, 128 insertions, 0 deletions
diff --git a/lib/libtsan/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc b/lib/libtsan/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc
new file mode 100644
index 0000000000..f6ac3fa5af
--- /dev/null
+++ b/lib/libtsan/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc
@@ -0,0 +1,128 @@
+//===-- sanitizer_common_interceptors_netbsd_compat.inc ---------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Common function interceptors for tools like AddressSanitizer,
+// ThreadSanitizer, MemorySanitizer, etc.
+//
+// Interceptors for NetBSD old function calls that have been versioned.
+//
+// NetBSD minimal version supported 9.0.
+// NetBSD current version supported 9.99.26.
+//
+//===----------------------------------------------------------------------===//
+
+#if SANITIZER_NETBSD
+
+// First undef all mangled symbols.
+// Next, define compat interceptors.
+// Finally, undef INIT_ and redefine it.
+// This allows to avoid preprocessor issues.
+
+#undef fstatvfs
+#undef fstatvfs1
+#undef getmntinfo
+#undef getvfsstat
+#undef statvfs
+#undef statvfs1
+
+INTERCEPTOR(int, statvfs, char *path, void *buf) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, statvfs, path, buf);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  // FIXME: under ASan the call below may write to freed memory and corrupt
+  // its metadata. See
+  // https://github.com/google/sanitizers/issues/321.
+  int res = REAL(statvfs)(path, buf);
+  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
+  return res;
+}
+
+INTERCEPTOR(int, fstatvfs, int fd, void *buf) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, fstatvfs, fd, buf);
+  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
+  // FIXME: under ASan the call below may write to freed memory and corrupt
+  // its metadata. See
+  // https://github.com/google/sanitizers/issues/321.
+  int res = REAL(fstatvfs)(fd, buf);
+  if (!res) {
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
+    if (fd >= 0)
+      COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
+  }
+  return res;
+}
+
+#undef INIT_STATVFS
+#define INIT_STATVFS \
+  COMMON_INTERCEPT_FUNCTION(statvfs); \
+  COMMON_INTERCEPT_FUNCTION(fstatvfs); \
+  COMMON_INTERCEPT_FUNCTION(__statvfs90); \
+  COMMON_INTERCEPT_FUNCTION(__fstatvfs90)
+
+INTERCEPTOR(int, __getmntinfo13, void **mntbufp, int flags) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, __getmntinfo13, mntbufp, flags);
+  int cnt = REAL(__getmntinfo13)(mntbufp, flags);
+  if (cnt > 0 && mntbufp) {
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mntbufp, sizeof(void *));
+    if (*mntbufp)
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *mntbufp, cnt * struct_statvfs90_sz);
+  }
+  return cnt;
+}
+
+#undef INIT_GETMNTINFO
+#define INIT_GETMNTINFO \
+  COMMON_INTERCEPT_FUNCTION(__getmntinfo13); \
+  COMMON_INTERCEPT_FUNCTION(__getmntinfo90)
+
+INTERCEPTOR(int, getvfsstat, void *buf, SIZE_T bufsize, int flags) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, getvfsstat, buf, bufsize, flags);
+  int ret = REAL(getvfsstat)(buf, bufsize, flags);
+  if (buf && ret > 0)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, ret * struct_statvfs90_sz);
+  return ret;
+}
+
+#undef INIT_GETVFSSTAT
+#define INIT_GETVFSSTAT \
+  COMMON_INTERCEPT_FUNCTION(getvfsstat); \
+  COMMON_INTERCEPT_FUNCTION(__getvfsstat90)
+
+INTERCEPTOR(int, statvfs1, const char *path, void *buf, int flags) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, statvfs1, path, buf, flags);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  int res = REAL(statvfs1)(path, buf, flags);
+  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
+  return res;
+}
+
+INTERCEPTOR(int, fstatvfs1, int fd, void *buf, int flags) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, fstatvfs1, fd, buf, flags);
+  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
+  int res = REAL(fstatvfs1)(fd, buf, flags);
+  if (!res) {
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
+    if (fd >= 0)
+      COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
+  }
+  return res;
+}
+
+#undef INIT_STATVFS1
+#define INIT_STATVFS1 \
+  COMMON_INTERCEPT_FUNCTION(statvfs1); \
+  COMMON_INTERCEPT_FUNCTION(fstatvfs1); \
+  COMMON_INTERCEPT_FUNCTION(__statvfs190); \
+  COMMON_INTERCEPT_FUNCTION(__fstatvfs190)
+
+#endif