Bug 1527597 - ReserveProcessExecutableMemory should use MAP_NORESERVE…

… r=jandem Differential Revision: https://phabricator.services.mozilla.com/D49612 --HG-- extra : moz-landing-system : lando
dothq · Oct 18, 2019 · 8ebf1d6 · 8ebf1d6
1 parent 54c4fda
commit 8ebf1d6
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/js/src/jit/ProcessExecutableMemory.cpp b/js/src/jit/ProcessExecutableMemory.cpp
@@ -344,8 +344,8 @@ static void* ReserveProcessExecutableMemory(size_t bytes) {
   // mmap will pick a different address.
   void* randomAddr = ComputeRandomAllocationAddress();
   void* p = MozTaggedAnonymousMmap(randomAddr, bytes, PROT_NONE,
-                                   MAP_PRIVATE | MAP_ANON, -1, 0,
-                                   "js-executable-memory");
+                                   MAP_NORESERVE | MAP_PRIVATE | MAP_ANON, -1,
+                                   0, "js-executable-memory");
   if (p == MAP_FAILED) {
     return nullptr;
   }