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// Copyright (c) 2012-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "util.h"
#include "support/allocators/secure.h"
#include "test/test_bitcoin.h"
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(allocator_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(arena_tests)
{
// Fake memory base address for testing
// without actually using memory.
void *synth_base = reinterpret_cast<void*>(0x08000000);
const size_t synth_size = 1024*1024;
Arena b(synth_base, synth_size, 16);
void *chunk = b.alloc(1000);
#ifdef ARENA_DEBUG
b.walk();
#endif
BOOST_CHECK(chunk != nullptr);
BOOST_CHECK(b.stats().used == 1008); // Aligned to 16
BOOST_CHECK(b.stats().total == synth_size); // Nothing has disappeared?
b.free(chunk);
#ifdef ARENA_DEBUG
b.walk();
#endif
BOOST_CHECK(b.stats().used == 0);
BOOST_CHECK(b.stats().free == synth_size);
try { // Test exception on double-free
b.free(chunk);
BOOST_CHECK(0);
} catch(std::runtime_error &)
{
}
void *a0 = b.alloc(128);
void *a1 = b.alloc(256);
void *a2 = b.alloc(512);
BOOST_CHECK(b.stats().used == 896);
BOOST_CHECK(b.stats().total == synth_size);
#ifdef ARENA_DEBUG
b.walk();
#endif
b.free(a0);
#ifdef ARENA_DEBUG
b.walk();
#endif
BOOST_CHECK(b.stats().used == 768);
b.free(a1);
BOOST_CHECK(b.stats().used == 512);
void *a3 = b.alloc(128);
#ifdef ARENA_DEBUG
b.walk();
#endif
BOOST_CHECK(b.stats().used == 640);
b.free(a2);
BOOST_CHECK(b.stats().used == 128);
b.free(a3);
BOOST_CHECK(b.stats().used == 0);
BOOST_CHECK_EQUAL(b.stats().chunks_used, 0);
BOOST_CHECK(b.stats().total == synth_size);
BOOST_CHECK(b.stats().free == synth_size);
BOOST_CHECK_EQUAL(b.stats().chunks_free, 1);
std::vector<void*> addr;
BOOST_CHECK(b.alloc(0) == nullptr); // allocating 0 always returns nullptr
#ifdef ARENA_DEBUG
b.walk();
#endif
// Sweeping allocate all memory
for (int x=0; x<1024; ++x)
addr.push_back(b.alloc(1024));
BOOST_CHECK(b.stats().free == 0);
BOOST_CHECK(b.alloc(1024) == nullptr); // memory is full, this must return nullptr
BOOST_CHECK(b.alloc(0) == nullptr);
for (int x=0; x<1024; ++x)
b.free(addr[x]);
addr.clear();
BOOST_CHECK(b.stats().total == synth_size);
BOOST_CHECK(b.stats().free == synth_size);
// Now in the other direction...
for (int x=0; x<1024; ++x)
addr.push_back(b.alloc(1024));
for (int x=0; x<1024; ++x)
b.free(addr[1023-x]);
addr.clear();
// Now allocate in smaller unequal chunks, then deallocate haphazardly
// Not all the chunks will succeed allocating, but freeing nullptr is
// allowed so that is no problem.
for (int x=0; x<2048; ++x)
addr.push_back(b.alloc(x+1));
for (int x=0; x<2048; ++x)
b.free(addr[((x*23)%2048)^242]);
addr.clear();
// Go entirely wild: free and alloc interleaved,
// generate targets and sizes using pseudo-randomness.
for (int x=0; x<2048; ++x)
addr.push_back(0);
uint32_t s = 0x12345678;
for (int x=0; x<5000; ++x) {
int idx = s & (addr.size()-1);
if (s & 0x80000000) {
b.free(addr[idx]);
addr[idx] = 0;
} else if(!addr[idx]) {
addr[idx] = b.alloc((s >> 16) & 2047);
}
bool lsb = s & 1;
s >>= 1;
if (lsb)
s ^= 0xf00f00f0; // LFSR period 0xf7ffffe0
}
for (void *ptr: addr)
b.free(ptr);
addr.clear();
BOOST_CHECK(b.stats().total == synth_size);
BOOST_CHECK(b.stats().free == synth_size);
}
/** Mock LockedPageAllocator for testing */
class TestLockedPageAllocator: public LockedPageAllocator
{
public:
TestLockedPageAllocator(int count_in, int lockedcount_in): count(count_in), lockedcount(lockedcount_in) {}
void* AllocateLocked(size_t len, bool *lockingSuccess) override
{
*lockingSuccess = false;
if (count > 0) {
--count;
if (lockedcount > 0) {
--lockedcount;
*lockingSuccess = true;
}
return reinterpret_cast<void*>(0x08000000 + (count<<24)); // Fake address, do not actually use this memory
}
return 0;
}
void FreeLocked(void* addr, size_t len) override
{
}
size_t GetLimit() override
{
return std::numeric_limits<size_t>::max();
}
private:
int count;
int lockedcount;
};
BOOST_AUTO_TEST_CASE(lockedpool_tests_mock)
{
// Test over three virtual arenas, of which one will succeed being locked
std::unique_ptr<LockedPageAllocator> x(new TestLockedPageAllocator(3, 1));
LockedPool pool(std::move(x));
BOOST_CHECK(pool.stats().total == 0);
BOOST_CHECK(pool.stats().locked == 0);
// Ensure unreasonable requests are refused without allocating anything
void *invalid_toosmall = pool.alloc(0);
BOOST_CHECK(invalid_toosmall == nullptr);
BOOST_CHECK(pool.stats().used == 0);
BOOST_CHECK(pool.stats().free == 0);
void *invalid_toobig = pool.alloc(LockedPool::ARENA_SIZE+1);
BOOST_CHECK(invalid_toobig == nullptr);
BOOST_CHECK(pool.stats().used == 0);
BOOST_CHECK(pool.stats().free == 0);
void *a0 = pool.alloc(LockedPool::ARENA_SIZE / 2);
BOOST_CHECK(a0);
BOOST_CHECK(pool.stats().locked == LockedPool::ARENA_SIZE);
void *a1 = pool.alloc(LockedPool::ARENA_SIZE / 2);
BOOST_CHECK(a1);
void *a2 = pool.alloc(LockedPool::ARENA_SIZE / 2);
BOOST_CHECK(a2);
void *a3 = pool.alloc(LockedPool::ARENA_SIZE / 2);
BOOST_CHECK(a3);
void *a4 = pool.alloc(LockedPool::ARENA_SIZE / 2);
BOOST_CHECK(a4);
void *a5 = pool.alloc(LockedPool::ARENA_SIZE / 2);
BOOST_CHECK(a5);
// We've passed a count of three arenas, so this allocation should fail
void *a6 = pool.alloc(16);
BOOST_CHECK(!a6);
pool.free(a0);
pool.free(a2);
pool.free(a4);
pool.free(a1);
pool.free(a3);
pool.free(a5);
BOOST_CHECK(pool.stats().total == 3*LockedPool::ARENA_SIZE);
BOOST_CHECK(pool.stats().locked == LockedPool::ARENA_SIZE);
BOOST_CHECK(pool.stats().used == 0);
}
// These tests used the live LockedPoolManager object, this is also used
// by other tests so the conditions are somewhat less controllable and thus the
// tests are somewhat more error-prone.
BOOST_AUTO_TEST_CASE(lockedpool_tests_live)
{
LockedPoolManager &pool = LockedPoolManager::Instance();
LockedPool::Stats initial = pool.stats();
void *a0 = pool.alloc(16);
BOOST_CHECK(a0);
// Test reading and writing the allocated memory
*((uint32_t*)a0) = 0x1234;
BOOST_CHECK(*((uint32_t*)a0) == 0x1234);
pool.free(a0);
try { // Test exception on double-free
pool.free(a0);
BOOST_CHECK(0);
} catch(std::runtime_error &)
{
}
// If more than one new arena was allocated for the above tests, something is wrong
BOOST_CHECK(pool.stats().total <= (initial.total + LockedPool::ARENA_SIZE));
// Usage must be back to where it started
BOOST_CHECK(pool.stats().used == initial.used);
}
BOOST_AUTO_TEST_SUITE_END()