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Merge pull request #12647 from DeterminateSystems/lock-json-logger

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JSONLogger: Acquire a lock to prevent log messages from clobbering each other
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Jörg Thalheim 2025-03-13 16:43:09 +01:00 committed by GitHub
commit e9af7a0749
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1 changed files with 15 additions and 1 deletions
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16
src/libutil/logging.cc
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@ -6,6 +6,7 @@
#include "config-global.hh"
#include "source-path.hh"
#include "position.hh"
#include "sync.hh"
#include <atomic>
#include <sstream>
@ -201,9 +202,22 @@ struct JSONLogger : Logger {
unreachable();
}
struct State
{
};
Sync<State> _state;
void write(const nlohmann::json & json)
{
writeLine(fd, "@nix " + json.dump(-1, ' ', false, nlohmann::json::error_handler_t::replace));
auto line =
"@nix " +
json.dump(-1, ' ', false, nlohmann::json::error_handler_t::replace);
/* Acquire a lock to prevent log messages from clobbering each
other. */
auto state(_state.lock());
writeLine(fd, line);
}
void log(Verbosity lvl, std::string_view s) override