[PATCH] D42065: Add new interceptors: access(2), faccessat(2)

[Kamil Rytarowski via Phabricator via llvm-commits]

krytarowski updated this revision to Diff 129846.

Repository:
  rL LLVM

https://reviews.llvm.org/D42065

Files:
  lib/sanitizer_common/sanitizer_common_interceptors.inc
  lib/sanitizer_common/sanitizer_platform_interceptors.h


Index: lib/sanitizer_common/sanitizer_platform_interceptors.h
===================================================================
--- lib/sanitizer_common/sanitizer_platform_interceptors.h
+++ lib/sanitizer_common/sanitizer_platform_interceptors.h
@@ -432,4 +432,7 @@
 #define SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION (!SI_WINDOWS && SI_NOT_FUCHSIA)
 #define SANITIZER_INTERCEPT_BSD_SIGNAL SI_ANDROID
 
+#define SANITIZER_INTERCEPT_ACCESS SI_NETBSD
+#define SANITIZER_INTERCEPT_FACCESSAT SI_NETBSD
+
 #endif  // #ifndef SANITIZER_PLATFORM_INTERCEPTORS_H
Index: lib/sanitizer_common/sanitizer_common_interceptors.inc
===================================================================
--- lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -6463,6 +6463,34 @@
 #define INIT_WCSCAT
 #endif
 
+#if SANITIZER_INTERCEPT_ACCESS
+INTERCEPTOR(int, access, char *path, int mode) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, access, path, mode);
+  if (path) {
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  }
+  return REAL(access)(path, mode);
+}
+#define INIT_ACCESS COMMON_INTERCEPT_FUNCTION(access)
+#else
+#define INIT_ACCESS
+#endif
+
+#if SANITIZER_INTERCEPT_FACCESSAT
+INTERCEPTOR(int, faccessat, int fd, char *path, int mode, int flags) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, faccessat, fd, path, mode, flags);
+  if (path) {
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  }
+  return REAL(faccessat)(fd, path, mode, flags);
+}
+#define INIT_FACCESSAT COMMON_INTERCEPT_FUNCTION(faccessat)
+#else
+#define INIT_FACCESSAT
+#endif
+
 static void InitializeCommonInterceptors() {
   static u64 metadata_mem[sizeof(MetadataHashMap) / sizeof(u64) + 1];
   interceptor_metadata_map = new((void *)&metadata_mem) MetadataHashMap();
@@ -6674,6 +6702,8 @@
   INIT_GETLOADAVG;
   INIT_WCSLEN;
   INIT_WCSCAT;
+  INIT_ACCESS;
+  INIT_FACCESSAT;
 
 #if SANITIZER_NETBSD
   COMMON_INTERCEPT_FUNCTION(__libc_mutex_lock);


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