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Serialize exceptions from the daemon to the client

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This commit is contained in:
Eelco Dolstra 2020-10-07 17:13:54 +02:00
parent be149acfda
commit c43e882f54
3 changed files with 24 additions and 11 deletions
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23
src/libstore/daemon.cc
View file

@ -101,17 +101,20 @@ struct TunnelLogger : public Logger
/* stopWork() means that we're done; stop sending stderr to the
client. */
void stopWork(bool success = true, const string & msg = "", unsigned int status = 0)
void stopWork(const Error * ex = nullptr)
{
auto state(state_.lock());
state->canSendStderr = false;
if (success)
if (!ex)
to << STDERR_LAST;
else {
to << STDERR_ERROR << msg;
if (status != 0) to << status;
if (GET_PROTOCOL_MINOR(clientVersion) >= 26) {
to << STDERR_ERROR << *ex;
} else {
to << STDERR_ERROR << ex->what() << ex->status;
}
}
}
@ -935,10 +938,11 @@ void processConnection(
during addTextToStore() / importPath(). If that
happens, just send the error message and exit. */
bool errorAllowed = tunnelLogger->state_.lock()->canSendStderr;
tunnelLogger->stopWork(false, e.msg(), e.status);
tunnelLogger->stopWork(&e);
if (!errorAllowed) throw;
} catch (std::bad_alloc & e) {
tunnelLogger->stopWork(false, "Nix daemon out of memory", 1);
auto ex = Error("Nix daemon out of memory");
tunnelLogger->stopWork(&ex);
throw;
}
@ -947,8 +951,13 @@ void processConnection(
assert(!tunnelLogger->state_.lock()->canSendStderr);
};
} catch (Error & e) {
tunnelLogger->stopWork(&e);
to.flush();
return;
} catch (std::exception & e) {
tunnelLogger->stopWork(false, e.what(), 1);
auto ex = Error(e.what());
tunnelLogger->stopWork(&ex);
to.flush();
return;
}

4
src/libstore/remote-store.cc
View file

@ -925,10 +925,14 @@ std::exception_ptr RemoteStore::Connection::processStderr(Sink * sink, Source *
}
else if (msg == STDERR_ERROR) {
if (GET_PROTOCOL_MINOR(daemonVersion) >= 26) {
return std::make_exception_ptr(readError(from));
} else {
string error = readString(from);
unsigned int status = readInt(from);
return std::make_exception_ptr(Error(status, error));
}
}
else if (msg == STDERR_NEXT)
printError(chomp(readString(from)));

2
src/libstore/worker-protocol.hh
View file

@ -6,7 +6,7 @@ namespace nix {
#define WORKER_MAGIC_1 0x6e697863
#define WORKER_MAGIC_2 0x6478696f
#define PROTOCOL_VERSION 0x119
#define PROTOCOL_VERSION 0x11a
#define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00)
#define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)