Squashed 'src/ipc/libmultiprocess/' changes from 1b8d4a6f1e54..13424cf2ecc1

13424cf2ecc1 Merge bitcoin-core/libmultiprocess#205: cmake: check for Cap'n Proto / Clang / C++20 incompatibility
72dce118649b Merge bitcoin-core/libmultiprocess#200: event loop: add LogOptions struct and reduce the log size
85003409f964 eventloop: add `LogOptions` struct
657d80622f81 cmake: capnproto pkg missing helpful error
d314057775a5 cmake: check for Cap'n Proto / Clang / C++20 incompatibility
878e84dc3030 Merge bitcoin-core/libmultiprocess#203: cmake: search capnproto in package mode only
1a85da5873c2 Merge bitcoin-core/libmultiprocess#202: doc: correct the build instructions for the example
df01873e1ecb Merge bitcoin-core/libmultiprocess#197: ci: Add freebsd and macos build
3bee07ab3367 cmake: search capnproto in package mode only
b6d3dc44194c doc: correct the build instructions for example
fa1ac3000055 ci: Add macos and freebsd task

git-subtree-dir: src/ipc/libmultiprocess
git-subtree-split: 13424cf2ecc1e5eadc85556cf1f4c65e915f702a

include/mp/proxy-io.h

@@ -130,6 +130,16 @@ public:
     std::ostringstream m_buffer;
 };
 
+struct LogOptions {
+
+    //! External logging callback.
+    LogFn log_fn;
+
+    //! Maximum number of characters to use when representing
+    //! request and response structs as strings.
+    size_t max_chars{200};
+};
+
 std::string LongThreadName(const char* exe_name);
 
 //! Event loop implementation.
@@ -204,12 +214,12 @@ public:
 
     Logger log()
     {
-        Logger logger(false, m_log_fn);
+        Logger logger(false, m_log_opts.log_fn);
         logger << "{" << LongThreadName(m_exe_name) << "} ";
         return logger;
     }
-    Logger logPlain() { return {false, m_log_fn}; }
-    Logger raise() { return {true, m_log_fn}; }
+    Logger logPlain() { return {false, m_log_opts.log_fn}; }
+    Logger raise() { return {true, m_log_opts.log_fn}; }
 
     //! Process name included in thread names so combined debug output from
     //! multiple processes is easier to understand.
@@ -255,8 +265,8 @@ public:
     //! List of connections.
     std::list<Connection> m_incoming_connections;
 
-    //! External logging callback.
-    LogFn m_log_fn;
+    //! Logging options
+    LogOptions m_log_opts;
 
     //! External context pointer.
     void* m_context;

include/mp/proxy-types.h

@@ -631,13 +631,13 @@ void clientInvoke(ProxyClient& proxy_client, const GetRequest& get_request, Fiel
         IterateFields().handleChain(*invoke_context, request, FieldList(), typename FieldObjs::BuildParams{&fields}...);
         proxy_client.m_context.loop->logPlain()
             << "{" << thread_context.thread_name << "} IPC client send "
-            << TypeName<typename Request::Params>() << " " << LogEscape(request.toString());
+            << TypeName<typename Request::Params>() << " " << LogEscape(request.toString(), proxy_client.m_context.loop->m_log_opts.max_chars);
 
         proxy_client.m_context.loop->m_task_set->add(request.send().then(
             [&](::capnp::Response<typename Request::Results>&& response) {
                 proxy_client.m_context.loop->logPlain()
                     << "{" << thread_context.thread_name << "} IPC client recv "
-                    << TypeName<typename Request::Results>() << " " << LogEscape(response.toString());
+                    << TypeName<typename Request::Results>() << " " << LogEscape(response.toString(), proxy_client.m_context.loop->m_log_opts.max_chars);
                 try {
                     IterateFields().handleChain(
                         *invoke_context, response, FieldList(), typename FieldObjs::ReadResults{&fields}...);
@@ -701,7 +701,7 @@ kj::Promise<void> serverInvoke(Server& server, CallContext& call_context, Fn fn)
 
     int req = ++server_reqs;
     server.m_context.loop->log() << "IPC server recv request  #" << req << " "
-                                     << TypeName<typename Params::Reads>() << " " << LogEscape(params.toString());
+                                     << TypeName<typename Params::Reads>() << " " << LogEscape(params.toString(), server.m_context.loop->m_log_opts.max_chars);
 
     try {
         using ServerContext = ServerInvokeContext<Server, CallContext>;
@@ -718,7 +718,7 @@ kj::Promise<void> serverInvoke(Server& server, CallContext& call_context, Fn fn)
             [&]() { return kj::Promise<CallContext>(kj::mv(call_context)); })
             .then([&server, req](CallContext call_context) {
                 server.m_context.loop->log() << "IPC server send response #" << req << " " << TypeName<Results>()
-                                                 << " " << LogEscape(call_context.getResults().toString());
+                                                 << " " << LogEscape(call_context.getResults().toString(), server.m_context.loop->m_log_opts.max_chars);
             });
     } catch (const std::exception& e) {
         server.m_context.loop->log() << "IPC server unhandled exception: " << e.what();

include/mp/util.h

@@ -203,7 +203,7 @@ std::string ThreadName(const char* exe_name);
 
 //! Escape binary string for use in log so it doesn't trigger unicode decode
 //! errors in python unit tests.
-std::string LogEscape(const kj::StringTree& string);
+std::string LogEscape(const kj::StringTree& string, size_t max_size);
 
 //! Callback type used by SpawnProcess below.
 using FdToArgsFn = std::function<std::vector<std::string>(int fd)>;