[compiler-rt] [nfc][sanitizer] Replace mmap with InternalMmapVector in test (PR #112756)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/112756

None

>From e947b528a7569f978a7b74b9bc694ede96374b03 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka at google.com>
Date: Thu, 17 Oct 2024 11:07:02 -0700
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
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Created using spr 1.3.4
---
 .../lib/sanitizer_common/tests/sanitizer_posix_test.cpp     | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/compiler-rt/lib/sanitizer_common/tests/sanitizer_posix_test.cpp b/compiler-rt/lib/sanitizer_common/tests/sanitizer_posix_test.cpp
index bed19d15a8ec77..803c8d39362e27 100644
--- a/compiler-rt/lib/sanitizer_common/tests/sanitizer_posix_test.cpp
+++ b/compiler-rt/lib/sanitizer_common/tests/sanitizer_posix_test.cpp
@@ -65,8 +65,8 @@ TEST(SanitizerCommon, PthreadDestructorIterations) {
 
 TEST(SanitizerCommon, IsAccessibleMemoryRange) {
   const int page_size = GetPageSize();
-  uptr mem = (uptr)mmap(0, 3 * page_size, PROT_READ | PROT_WRITE,
-                        MAP_PRIVATE | MAP_ANON, -1, 0);
+  InternalMmapVector<char> buffer(3 * page_size);
+  uptr mem = reinterpret_cast<uptr>(buffer.data());
   // Protect the middle page.
   mprotect((void *)(mem + page_size), page_size, PROT_NONE);
   EXPECT_TRUE(IsAccessibleMemoryRange(mem, page_size - 1));
@@ -78,8 +78,6 @@ TEST(SanitizerCommon, IsAccessibleMemoryRange) {
   EXPECT_TRUE(IsAccessibleMemoryRange(mem + 2 * page_size, page_size));
   EXPECT_FALSE(IsAccessibleMemoryRange(mem, 3 * page_size));
   EXPECT_FALSE(IsAccessibleMemoryRange(0x0, 2));
-
-  munmap((void *)mem, 3 * page_size);
 }
 
 }  // namespace __sanitizer