Merge "Test stack buffer size calculation." into main

#include "unwindstack/Memory.h"

#include <android-base/test_utils.h>

#include <procinfo/process_map.h>

#include "gtest/gtest.h"

#include "libdebuggerd/tombstone.h"

  EXPECT_EQ(e.tag(), 1ULL);

}

static std::optional<android::procinfo::MapInfo> FindMapping(void* data) {

  std::optional<android::procinfo::MapInfo> result;

  android::procinfo::ReadMapFile(

      "/proc/self/maps", [&result, data](const android::procinfo::MapInfo& info) {

        auto data_int = reinterpret_cast<uint64_t>(data) & ((1ULL << 56ULL) - 1ULL);

        if (info.start <= data_int && data_int < info.end) {

          result = info;

        }

      });

  return result;

}

TEST_P(MteStackHistoryTest, TestFree) {

  int size_cls = GetParam();

  size_t size = stack_mte_ringbuffer_size(size_cls);

  void* data = stack_mte_ringbuffer_allocate(size_cls, nullptr);

  EXPECT_EQ(stack_mte_ringbuffer_size_from_pointer(reinterpret_cast<uintptr_t>(data)), size);

  auto before = FindMapping(data);

  ASSERT_TRUE(before.has_value());

  EXPECT_EQ(before->end - before->start, size);

  stack_mte_free_ringbuffer(reinterpret_cast<uintptr_t>(data));

  for (size_t i = 0; i < size; i += page_size()) {

    auto after = FindMapping(static_cast<char*>(data) + i);

    EXPECT_TRUE(!after.has_value() || after->name != before->name);

  }

}

TEST_P(MteStackHistoryTest, TestEmpty) {

  int size_cls = GetParam();

  size_t size = stack_mte_ringbuffer_size(size_cls);