fixed readlinkat to handle AT_FDCWD

hariharan-devarajan · Sep 30, 2024 · 8a3b438 · 8a3b438
1 parent 518204b
commit 8a3b438
Showing 1 changed file with 15 additions and 5 deletions.
diff --git a/src/dftracer/brahma/posix.cpp b/src/dftracer/brahma/posix.cpp
@@ -382,11 +382,21 @@ ssize_t brahma::POSIXDFTracer::readlink(const char *path, char *buf,
 ssize_t brahma::POSIXDFTracer::readlinkat(int fd, const char *path, char *buf,
                                           size_t bufsize) {
   BRAHMA_MAP_OR_FAIL(readlinkat);
-  DFT_LOGGER_START(fd);
-  DFT_LOGGER_UPDATE(fd);
-  DFT_LOGGER_UPDATE(bufsize);
-  ssize_t ret = __real_readlinkat(fd, path, buf, bufsize);
-  DFT_LOGGER_END();
+  ssize_t ret;
+  if (fd != AT_FDCWD) {
+    DFT_LOGGER_START(fd);
+    DFT_LOGGER_UPDATE(fd);
+    DFT_LOGGER_UPDATE(path);
+    DFT_LOGGER_UPDATE(bufsize);
+    ret = __real_readlinkat(fd, path, buf, bufsize);
+    DFT_LOGGER_END();
+  } else {
+    DFT_LOGGER_START(path);
+    DFT_LOGGER_UPDATE(fd);
+    DFT_LOGGER_UPDATE(bufsize);
+    ret = __real_readlinkat(fd, path, buf, bufsize);
+    DFT_LOGGER_END();
+  }
   return ret;
 }