[msan] Interceptors for pipe2 and socketpair.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@179022 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 39 insertions, 0 deletions

diff --git a/lib/msan/msan_interceptors.cc b/lib/msan/msan_interceptors.cc
index 1dafc5d6c..b1caf0e73 100644
--- a/lib/msan/msan_interceptors.cc
+++ b/lib/msan/msan_interceptors.cc
@@ -540,6 +540,22 @@ INTERCEPTOR(int, pipe, int pipefd[2]) {
   return res;
 }
 
+INTERCEPTOR(int, pipe2, int pipefd[2], int flags) {
+  ENSURE_MSAN_INITED();
+  int res = REAL(pipe2)(pipefd, flags);
+  if (!res)
+    __msan_unpoison(pipefd, sizeof(int[2]));
+  return res;
+}
+
+INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) {
+  ENSURE_MSAN_INITED();
+  int res = REAL(socketpair)(domain, type, protocol, sv);
+  if (!res)
+    __msan_unpoison(sv, sizeof(int[2]));
+  return res;
+}
+
 INTERCEPTOR(int, wait, int *status) {
   ENSURE_MSAN_INITED();
   int res = REAL(wait)(status);
@@ -1109,6 +1125,8 @@ void InitializeInterceptors() {
   INTERCEPT_FUNCTION(__xstat64);
   INTERCEPT_FUNCTION(__lxstat64);
   INTERCEPT_FUNCTION(pipe);
+  INTERCEPT_FUNCTION(pipe2);
+  INTERCEPT_FUNCTION(socketpair);
   INTERCEPT_FUNCTION(wait);
   INTERCEPT_FUNCTION(waitpid);
   INTERCEPT_FUNCTION(fgets);
diff --git a/lib/msan/tests/msan_test.cc b/lib/msan/tests/msan_test.cc
index d7c1de0fe..6ab084968 100644
--- a/lib/msan/tests/msan_test.cc
+++ b/lib/msan/tests/msan_test.cc
@@ -41,6 +41,7 @@
 #include <sys/types.h>
 #include <dirent.h>
 #include <pwd.h>
+#include <sys/socket.h>
 
 #if defined(__i386__) || defined(__x86_64__)
 # include <emmintrin.h>
@@ -605,6 +606,26 @@ TEST(MemorySanitizer, pipe) {
   close(pipefd[1]);
 }
 
+TEST(MemorySanitizer, pipe2) {
+  int* pipefd = new int[2];
+  int res = pipe2(pipefd, O_NONBLOCK);
+  assert(!res);
+  EXPECT_NOT_POISONED(pipefd[0]);
+  EXPECT_NOT_POISONED(pipefd[1]);
+  close(pipefd[0]);
+  close(pipefd[1]);
+}
+
+TEST(MemorySanitizer, socketpair) {
+  int sv[2];
+  int res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
+  assert(!res);
+  EXPECT_NOT_POISONED(sv[0]);
+  EXPECT_NOT_POISONED(sv[1]);
+  close(sv[0]);
+  close(sv[1]);
+}
+
 TEST(MemorySanitizer, getcwd) {
   char path[PATH_MAX + 1];
   char* res = getcwd(path, sizeof(path));