TheRock/rocm-systems/projects/rocshmem/tests/unit_tests/dlmalloc_gtest.cpp

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#include "dlmalloc_gtest.hpp"
#include <cstdint>

using namespace rocshmem;

// a small portion of the heap is not available due to cost of dlmalloc bookkeeping
#define DLMALLOC_BOOKKEEPING static_cast<size_t>(128 * ALIGNMENT)

TEST_F(DLMallocTestFixture, used_0_bytes) {
  size_t heap_size{1 << 30};
  ASSERT_LE(strat_.get_used(), DLMALLOC_BOOKKEEPING);
  ASSERT_EQ(strat_.get_used() + strat_.get_avail(), heap_size);
}

TEST_F(DLMallocTestFixture, alloc_0_bytes) {
  size_t initial_used{strat_.get_used()};
  char* c_ptr{nullptr};
  size_t size{0};
  strat_.alloc(&c_ptr, size);
  ASSERT_EQ(c_ptr, nullptr);
  ASSERT_EQ(strat_.get_used(), initial_used);
}

TEST_F(DLMallocTestFixture, alloc_1_byte) {
  char* c_ptr{nullptr};
  size_t size{1};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_128_bytes) {
  char* c_ptr{nullptr};
  size_t size{128};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_256_bytes) {
  char* c_ptr{nullptr};
  size_t size{256};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_512_bytes) {
  char* c_ptr{nullptr};
  size_t size{512};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_513_bytes) {
  char* c_ptr{nullptr};
  size_t size{513};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_4KB) {
  char* c_ptr{nullptr};
  size_t size{4096};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_128KB) {
  char* c_ptr{nullptr};
  size_t size{131072};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
}

TEST_F(DLMallocTestFixture, alloc_1GB) {
  char* c_ptr{nullptr};
  size_t heap_size{1 << 30};
  size_t size{heap_size - DLMALLOC_BOOKKEEPING};

  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
  ASSERT_EQ(strat_.get_used() + strat_.get_avail(), heap_size);
}

TEST_F(DLMallocTestFixture, alloc_256_bytes_X2_free_256_bytes_X2) {
  char* c_ptr_1{nullptr};
  char* c_ptr_2{nullptr};
  size_t size{256};
  strat_.alloc(&c_ptr_1, size);
  ASSERT_NE(c_ptr_1, nullptr);
  strat_.alloc(&c_ptr_2, size);
  ASSERT_NE(c_ptr_2, nullptr);

  strat_.free(c_ptr_1);
  strat_.free(c_ptr_2);
}

TEST_F(DLMallocTestFixture, alloc_1GB_free_1GB) {
  char* c_ptr{nullptr};
  size_t heap_size{1 << 30};
  size_t size{heap_size - DLMALLOC_BOOKKEEPING};
  strat_.alloc(&c_ptr, size);
  ASSERT_NE(c_ptr, nullptr);
  ASSERT_EQ(strat_.get_used() + strat_.get_avail(), heap_size);

  strat_.free(c_ptr);
}