src: large pages fix FreeBSD fix region size

Makes the size aligned to huge page size by calculating it from the aligned lower and upper boundary of the executable address. PR-URL: nodejs#28735 Reviewed-By: Rod Vagg <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Rich Trott <[email protected]>
sxa · Jul 30, 2019 · de88d6c · de88d6c
1 parent 4a1502b
commit de88d6c
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/src/large_pages/node_large_page.cc b/src/large_pages/node_large_page.cc
@@ -199,12 +199,14 @@ static struct text_region FindNodeTextRegion() {
      (entry->kve_protection & KVME_PROT_EXEC));
 
     if (!strcmp(exename.c_str(), entry->kve_path) && excmapping) {
-      size_t size = entry->kve_end - entry->kve_start;
+      char* estart =
+        reinterpret_cast<char*>(hugepage_align_up(entry->kve_start));
+      char* eend =
+        reinterpret_cast<char*>(hugepage_align_down(entry->kve_end));
+      size_t size = eend - estart;
       nregion.found_text_region = true;
-      nregion.from =
-         reinterpret_cast<char*>(hugepage_align_up(entry->kve_start));
-      nregion.to =
-         reinterpret_cast<char*>(hugepage_align_down(entry->kve_end));
+      nregion.from = estart;
+      nregion.to = eend;
       nregion.total_hugepages = size / hps;
       break;
     }