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#include "tensorflow/core/framework/tracking_allocator.h"
#include <unordered_map>
#include "tensorflow/core/framework/allocator.h"
#include "tensorflow/core/platform/logging.h"
#include <gtest/gtest.h>
namespace tensorflow {
class TestableSizeTrackingAllocator : public Allocator {
public:
string Name() override { return "test"; }
void* AllocateRaw(size_t /*alignment*/, size_t num_bytes) override {
void* ptr = malloc(num_bytes);
size_map_[ptr] = num_bytes;
return ptr;
}
void DeallocateRaw(void* ptr) override {
const auto& iter = size_map_.find(ptr);
EXPECT_NE(size_map_.end(), iter);
size_map_.erase(iter);
free(ptr);
}
bool TracksAllocationSizes() override { return true; }
size_t RequestedSize(void* ptr) override {
const auto& iter = size_map_.find(ptr);
EXPECT_NE(size_map_.end(), iter);
return iter->second;
}
private:
std::unordered_map<void*, size_t> size_map_;
};
class NoMemoryAllocator : public Allocator {
public:
string Name() override { return "test"; }
void* AllocateRaw(size_t /*alignment*/, size_t num_bytes) override {
return nullptr;
}
void DeallocateRaw(void* ptr) override {}
bool TracksAllocationSizes() override { return true; }
};
TEST(TrackingAllocatorTest, SimpleNoTracking) {
Allocator* a = cpu_allocator();
EXPECT_FALSE(a->TracksAllocationSizes());
TrackingAllocator* ta = new TrackingAllocator(a);
void* p1 = ta->AllocateRaw(4, 4);
ta->Deallocate(p1);
void* p2 = ta->AllocateRaw(4, 12);
std::pair<size_t, size_t> sizes = ta->GetSizesAndUnRef();
EXPECT_EQ(16, sizes.first);
EXPECT_EQ(0, sizes.second);
ta->Deallocate(p2);
}
TEST(TrackingAllocatorTest, SimpleTracking) {
TestableSizeTrackingAllocator a = TestableSizeTrackingAllocator();
EXPECT_TRUE(a.TracksAllocationSizes());
TrackingAllocator* ta = new TrackingAllocator(&a);
void* p1 = ta->AllocateRaw(4, 12);
ta->Deallocate(p1);
void* p2 = ta->AllocateRaw(4, 4);
std::pair<size_t, size_t> sizes = ta->GetSizesAndUnRef();
EXPECT_EQ(16, sizes.first);
EXPECT_EQ(12, sizes.second);
ta->Deallocate(p2);
}
TEST(TrackingAllocatorTest, OutOfMemory) {
NoMemoryAllocator a;
EXPECT_TRUE(a.TracksAllocationSizes());
TrackingAllocator* ta = new TrackingAllocator(&a);
void* p1 = ta->AllocateRaw(4, 12);
EXPECT_EQ(nullptr, p1);
std::pair<size_t, size_t> sizes = ta->GetSizesAndUnRef();
EXPECT_EQ(0, sizes.first);
EXPECT_EQ(0, sizes.second);
}
TEST(TrackingAllocatorTest, FreeNullPtr) {
NoMemoryAllocator a;
EXPECT_TRUE(a.TracksAllocationSizes());
TrackingAllocator* ta = new TrackingAllocator(&a);
ta->DeallocateRaw(nullptr);
std::pair<size_t, size_t> sizes = ta->GetSizesAndUnRef();
EXPECT_EQ(0, sizes.first);
EXPECT_EQ(0, sizes.second);
}
} // namespace tensorflow
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