ClangdXPCTestClient.cpp
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//===-- ClangdXPCTestClient.cpp ----------------------------------*- C++-*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "xpc/Conversion.h"
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include <dlfcn.h>
#include <stdio.h>
#include <string>
#include <xpc/xpc.h>
typedef const char *(*clangd_xpc_get_bundle_identifier_t)(void);
using namespace llvm;
using namespace clang;
std::string getLibraryPath() {
Dl_info info;
if (dladdr((void *)(uintptr_t)getLibraryPath, &info) == 0)
llvm_unreachable("Call to dladdr() failed");
llvm::SmallString<128> LibClangPath;
LibClangPath = llvm::sys::path::parent_path(
llvm::sys::path::parent_path(info.dli_fname));
llvm::sys::path::append(LibClangPath, "lib", "ClangdXPC.framework",
"ClangdXPC");
return LibClangPath.str();
}
static void dumpXPCObject(xpc_object_t Object, llvm::raw_ostream &OS) {
xpc_type_t Type = xpc_get_type(Object);
if (Type == XPC_TYPE_DICTIONARY) {
json::Value Json = clang::clangd::xpcToJson(Object);
OS << Json;
} else {
OS << "<UNKNOWN>";
}
}
int main(int argc, char *argv[]) {
// Open the ClangdXPC dylib in the framework.
std::string LibPath = getLibraryPath();
void *dlHandle = dlopen(LibPath.c_str(), RTLD_LOCAL | RTLD_FIRST);
if (!dlHandle) {
llvm::errs() << "Failed to load framework from \'" << LibPath << "\'\n";
return 1;
}
// Lookup the XPC service bundle name, and launch it.
clangd_xpc_get_bundle_identifier_t clangd_xpc_get_bundle_identifier =
(clangd_xpc_get_bundle_identifier_t)dlsym(
dlHandle, "clangd_xpc_get_bundle_identifier");
xpc_connection_t conn = xpc_connection_create(
clangd_xpc_get_bundle_identifier(), dispatch_get_main_queue());
// Dump the XPC events.
xpc_connection_set_event_handler(conn, ^(xpc_object_t event) {
if (event == XPC_ERROR_CONNECTION_INVALID) {
llvm::errs() << "Received XPC_ERROR_CONNECTION_INVALID.";
exit(EXIT_SUCCESS);
}
if (event == XPC_ERROR_CONNECTION_INTERRUPTED) {
llvm::errs() << "Received XPC_ERROR_CONNECTION_INTERRUPTED.";
exit(EXIT_SUCCESS);
}
dumpXPCObject(event, llvm::outs());
llvm::outs() << "\n";
});
xpc_connection_resume(conn);
// Read the input to determine the things to send to clangd.
llvm::ErrorOr<std::unique_ptr<MemoryBuffer>> Stdin =
llvm::MemoryBuffer::getSTDIN();
if (!Stdin) {
llvm::errs() << "Failed to get STDIN!\n";
return 1;
}
for (llvm::line_iterator It(**Stdin, /*SkipBlanks=*/true,
/*CommentMarker=*/'#');
!It.is_at_eof(); ++It) {
StringRef Line = *It;
if (auto Request = json::parse(Line)) {
xpc_object_t Object = clangd::jsonToXpc(*Request);
xpc_connection_send_message(conn, Object);
} else {
llvm::errs() << llvm::Twine("JSON parse error: ")
<< llvm::toString(Request.takeError());
return 1;
}
}
dispatch_main();
// dispatch_main() doesn't return
return EXIT_FAILURE;
}