//TODO: error handling?
int VMBase::Create(Str::StringRef name, Type type)
{
if (module) {
Com_Printf(S_ERROR "Attempting to re-create an already-loaded VM");
return -1;
}
const std::string& libPath = FS::GetLibPath();
bool debug = Cvar_Get("vm_debug", "0", CVAR_INIT)->integer;
if (type == TYPE_NATIVE) {
std::string exe = FS::Path::Build(libPath, name + EXE_EXT);
Com_Printf("Trying to load native module %s\n", exe.c_str());
module = NaCl::LoadModule(exe.c_str(), nullptr, debug);
} else if (type == TYPE_NACL) {
// Extract the nexe from the pak so that sel_ldr can load it
std::string nexe = name + "-" ARCH_STRING ".nexe";
try {
FS::File out = FS::HomePath::OpenWrite(nexe);
FS::PakPath::CopyFile(nexe, out);
out.Close();
} catch (std::system_error& err) {
Com_Printf(S_ERROR "Failed to extract NaCl module %s: %s\n", nexe.c_str(), err.what());
return -1;
}
std::string sel_ldr = FS::Path::Build(libPath, "sel_ldr" EXE_EXT);
std::string irt = FS::Path::Build(libPath, "irt_core-" ARCH_STRING ".nexe");
#ifdef __linux__
std::string bootstrap = FS::Path::Build(libPath, "nacl_helper_bootstrap");
NaCl::LoaderParams params = {sel_ldr.c_str(), irt.c_str(), bootstrap.c_str()};
#else
NaCl::LoaderParams params = {sel_ldr.c_str(), irt.c_str(), nullptr};
#endif
Com_Printf("Trying to load NaCl module %s\n", nexe.c_str());
module = NaCl::LoadModule(FS::Path::Build(FS::GetHomePath(), nexe).c_str(), ¶ms, debug);
} else {
Com_Printf(S_ERROR "Invalid VM type");
return -1;
}
if (!module) {
Com_Printf(S_ERROR "Couldn't load VM %s", name.c_str());
return -1;
}
if (debug)
Com_Printf("Waiting for GDB connection on localhost:4014\n");
// Read the ABI version from the root socket.
// If this fails, we assume the remote process failed to start
std::vector<char> buffer;
if (!module.GetRootSocket().RecvMsg(buffer) || buffer.size() != sizeof(int)) {
Com_Printf(S_ERROR "The '%s' VM did not start.", name.c_str());
return -1;
}
Com_Printf("Loaded module with the NaCl ABI");
return *reinterpret_cast<int*>(buffer.data());
}
void FS_WriteFile(const char* path, const void* buffer, int size)
{
try {
FS::File f = FS::HomePath::OpenWrite(path);
f.Write(buffer, size);
f.Close();
} catch (std::system_error& err) {
Log::Notice("Failed to write file '%s': %s\n", path, err.what());
}
}
void History::Save() {
try {
FS::File f = FS::HomePath::OpenWrite(GetFilename());
auto lock = Lock();
Container::size_type i = 0;
if ( lines.size() > SAVED_HISTORY_LINES )
i = lines.size() - SAVED_HISTORY_LINES;
for (; i < lines.size(); i++)
{
f.Write(lines[i].data(), lines[i].size());
f.Write("\n", 1);
}
} catch (const std::system_error& error) {
Log::Warn("Couldn't write %s: %s", GetFilename(), error.what());
}
}
void History::Load() {
std::string buffer;
try {
FS::File f = FS::HomePath::OpenRead(GetFilename());
buffer = f.ReadAll();
} catch (const std::system_error& error) {
Log::Warn("Couldn't read %s: %s", GetFilename(), error.what());
}
auto lock = Lock();
lines.clear();
std::size_t currentPos = 0;
std::size_t nextPos = 0;
while (true)
{
nextPos = buffer.find('\n', currentPos);
if ( nextPos == std::string::npos )
break;
lines.emplace_back(buffer, currentPos, (nextPos - currentPos));
currentPos = nextPos + 1;
}
}