Test program:
#include <boost/iostreams/device/array.hpp>
#include <boost/iostreams/stream.hpp>
#include <vector>
#include <cstdlib>
#include <iostream>
#include <cmath>
int main(int argc, char* argv[])
{
// some numbers such that total buffer is larger than 2GB
const std::streamoff s1(2000);
const std::streamoff s2(314748);
std::vector<float> buffer(s1*s2);
const auto buf_size = static_cast<std::streamsize>(buffer.size())* sizeof(float);
typedef boost::iostreams::stream<boost::iostreams::array> array_stream;
array_stream s(reinterpret_cast<char *>(buffer.data()), buf_size);
// write some data from a smaller buffer
std::vector<float> buffer2(s2, 1.F);
for (std::streamoff i=0; i<s1; ++i)
{
std::cout << "before (" << i << ") " << s.tellp() << std::endl;
s.write(reinterpret_cast<const char *>(buffer2.data()), s2*sizeof(float));
}
if (std::abs(buffer[s1*s2-1] -1.F) > .001F)
{
std::cerr << "wrong output\n";
return 1;
}
return 0;
}fails. g++-8 and boost 1.65.1 gives
...
before (1704) 2145322368
before (1705) 2146581360
before (1706) -1
before (1707) -1
...
wrong output
g++-12 and boost 1.74.0. gives
...
before (1704) 2145322368
before (1705) 2146581360
terminate called after throwing an instance of 'boost::wrapexcept<std::ios_base::failure[abi:cxx11]>'
what(): bad seek: iostream error
Aborted (core dumped)
It works fine when not calling tellg(). This is similar to boostorg/interprocess#190, although here we don't have a segfault.
Test program:
fails. g++-8 and boost 1.65.1 gives
g++-12 and boost 1.74.0. gives
It works fine when not calling
tellg(). This is similar to boostorg/interprocess#190, although here we don't have a segfault.