From 575129886c2db6c7ae1dfd2655d2053166049ad1 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Mon, 2 Oct 2017 22:49:18 -0700
Subject: [PATCH] Pre-size the vector in the pthread_create ENOMEM test.

Just to avoid the possibility of an unfortunate mmap occurring in order to
grow the vector.

Bug: N/A
Test: ran tests
Change-Id: I850740461d761916a0377272664159d010da7b84
---
 tests/pthread_test.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/pthread_test.cpp b/tests/pthread_test.cpp
index 46140bbc6..f342577a9 100755
--- a/tests/pthread_test.cpp
+++ b/tests/pthread_test.cpp
@@ -2117,8 +2117,9 @@ TEST(pthread, pthread_create__mmap_failures) {
 
   const auto kPageSize = sysconf(_SC_PAGE_SIZE);
 
-  // Use up all the VMAs. By default this is 64Ki.
+  // Use up all the VMAs. By default this is 64Ki (though some will already be in use).
   std::vector<void*> pages;
+  pages.reserve(64 * 1024);
   int prot = PROT_NONE;
   while (true) {
     void* page = mmap(nullptr, kPageSize, prot, MAP_ANON|MAP_PRIVATE, -1, 0);