From 0cac2919fdb631f09d5bfb58578fe6477a3f0401 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Tue, 2 Aug 2022 18:25:22 +0000
Subject: [PATCH] Don't even try to allocate 2GiB on LP32.

std::vector will just throw std::length_error anyway...

Bug: http://b/241114825
Test: treehugger
Change-Id: I44a9be9a5357c7b3a1c1d1273ef90a023a91e81b
---
 tests/stdio_test.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index 5e4e06811..46b0cbee5 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -2940,28 +2940,38 @@ TEST(STDIO_TEST, freopen_null_filename_mode) {
   fclose(fp);
 }
 
+#if defined(__LP64__)
 static int64_t GetTotalRamGiB() {
   struct sysinfo si;
   sysinfo(&si);
   return (static_cast<int64_t>(si.totalram) * si.mem_unit) / 1024 / 1024 / 1024;
 }
+#endif
 
 TEST(STDIO_TEST, fread_int_overflow) {
+#if defined(__LP64__)
   if (GetTotalRamGiB() <= 4) GTEST_SKIP() << "not enough memory";
 
   const size_t too_big_for_an_int = 0x80000000ULL;
   std::vector<char> buf(too_big_for_an_int);
   std::unique_ptr<FILE, decltype(&fclose)> fp{fopen("/dev/zero", "re"), fclose};
   ASSERT_EQ(too_big_for_an_int, fread(&buf[0], 1, too_big_for_an_int, fp.get()));
+#else
+  GTEST_SKIP() << "32-bit can't allocate 2GiB";
+#endif
 }
 
 TEST(STDIO_TEST, fwrite_int_overflow) {
+#if defined(__LP64__)
   if (GetTotalRamGiB() <= 4) GTEST_SKIP() << "not enough memory";
 
   const size_t too_big_for_an_int = 0x80000000ULL;
   std::vector<char> buf(too_big_for_an_int);
   std::unique_ptr<FILE, decltype(&fclose)> fp{fopen("/dev/null", "we"), fclose};
   ASSERT_EQ(too_big_for_an_int, fwrite(&buf[0], 1, too_big_for_an_int, fp.get()));
+#else
+  GTEST_SKIP() << "32-bit can't allocate 2GiB";
+#endif
 }
 
 TEST(STDIO_TEST, snprintf_b) {