ClickHouse/base/common/tests/allocator.cpp

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#include <cstdlib>
#include <cstring>
#include <vector>
#include <thread>
void thread_func()
{
for (size_t i = 0; i < 100; ++i)
{
size_t size = 4096;
void * buf = malloc(size);
if (!buf)
abort();
memset(buf, 0, size);
while (size < 1048576)
{
size_t next_size = size * 4;
void * new_buf = realloc(buf, next_size);
if (!new_buf)
abort();
buf = new_buf;
memset(reinterpret_cast<char*>(buf) + size, 0, next_size - size);
size = next_size;
}
free(buf);
}
}
int main(int, char **)
{
std::vector<std::thread> threads(16);
for (size_t i = 0; i < 1000; ++i)
{
for (auto & thread : threads)
thread = std::thread(thread_func);
for (auto & thread : threads)
thread.join();
}
return 0;
}