Add new NetBSD interceptors: devname(3), devname_r(3)

Summary:
devname, devname_r - get device name

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka

Reviewed By: vitalybuka

Subscribers: kubamracek, llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D42053

llvm-svn: 324120

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc

@@ -6758,6 +6758,36 @@ INTERCEPTOR(SIZE_T, strlcat, char *dst, char *src, SIZE_T size) {
 #define INIT_STRLCPY
 #endif
 
+#if SANITIZER_INTERCEPT_DEVNAME
+INTERCEPTOR(char *, devname, u64 dev, u32 type) {
+  void *ctx;
+  char *name;
+  COMMON_INTERCEPTOR_ENTER(ctx, devname, dev, type);
+  name = REAL(devname)(dev, type);
+  if (name)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  return name;
+}
+#define INIT_DEVNAME COMMON_INTERCEPT_FUNCTION(devname);
+#else
+#define INIT_DEVNAME
+#endif
+
+#if SANITIZER_INTERCEPT_DEVNAME_R
+INTERCEPTOR(int, devname_r, u64 dev, u32 type, char *path, uptr len) {
+  void *ctx;
+  int res;
+  COMMON_INTERCEPTOR_ENTER(ctx, devname_r, dev, type, path, len);
+  res = REAL(devname_r)(dev, type, path, len);
+  if (!res)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  return res;
+}
+#define INIT_DEVNAME_R COMMON_INTERCEPT_FUNCTION(devname_r);
+#else
+#define INIT_DEVNAME_R
+#endif
+
 static void InitializeCommonInterceptors() {
   static u64 metadata_mem[sizeof(MetadataHashMap) / sizeof(u64) + 1];
   interceptor_metadata_map = new((void *)&metadata_mem) MetadataHashMap();
@@ -6983,6 +7013,8 @@ static void InitializeCommonInterceptors() {
   INIT_NAME_TO_HANDLE_AT;
   INIT_OPEN_BY_HANDLE_AT;
   INIT_STRLCPY;
+  INIT_DEVNAME;
+  INIT_DEVNAME_R;
 
 #if SANITIZER_NETBSD
   COMMON_INTERCEPT_FUNCTION(__libc_mutex_lock);

compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h

@@ -456,4 +456,7 @@
 #define SANITIZER_INTERCEPT_READLINKAT \
   (SI_POSIX && !SI_MAC_DEPLOYMENT_BELOW_10_10)
 
+#define SANITIZER_INTERCEPT_DEVNAME SI_NETBSD
+#define SANITIZER_INTERCEPT_DEVNAME_R SI_NETBSD
+
 #endif  // #ifndef SANITIZER_PLATFORM_INTERCEPTORS_H

compiler-rt/test/sanitizer_common/TestCases/NetBSD/devname.cc

@@ -0,0 +1,22 @@
+// RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+int main(void) {
+  struct stat st;
+  char *name;
+
+  if (stat("/dev/null", &st))
+    exit(1);
+
+  if (!(name = devname(st.st_rdev, S_ISCHR(st.st_mode) ? S_IFCHR : S_IFBLK)))
+    exit(1);
+
+  printf("%s\n", name);
+
+  // CHECK: null
+
+  return 0;
+}

compiler-rt/test/sanitizer_common/TestCases/NetBSD/devname_r.cc

@@ -0,0 +1,27 @@
+// RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck
+
+#include <sys/cdefs.h>
+#include <sys/stat.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+  struct stat st;
+  char name[10];
+  mode_t type;
+
+  if (stat("/dev/null", &st))
+    exit(1);
+
+  type = S_ISCHR(st.st_mode) ? S_IFCHR : S_IFBLK;
+
+  if (devname_r(st.st_rdev, type, name, __arraycount(name)))
+    exit(1);
+
+  printf("%s\n", name);
+
+  // CHECK: null
+
+  return 0;
+}