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SymbolServer: Add symbolication service for out-of-process ELF parsing

This patch adds SymbolServer, a service daemon that provides
symbolication of ELF binaries. It has a very simple IPC API at the
moment that only turns addresses into symbol names.

This can be used to implement symbolication without having to do
in-process ELF parsing yourself. :^)
This commit is contained in:
Andreas Kling 2021-02-04 19:58:21 +01:00
parent 54d28df97d
commit aefd206038
11 changed files with 285 additions and 0 deletions

View file

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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/EventLoop.h>
#include <LibCore/LocalServer.h>
#include <LibIPC/ClientConnection.h>
#include <SymbolServer/ClientConnection.h>
int main(int, char**)
{
Core::EventLoop event_loop;
auto server = Core::LocalServer::construct();
if (pledge("stdio rpath accept", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/bin", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/usr/lib", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil(nullptr, nullptr) < 0) {
perror("unveil");
return 1;
}
bool ok = server->take_over_from_system_server();
ASSERT(ok);
server->on_ready_to_accept = [&] {
auto client_socket = server->accept();
if (!client_socket) {
dbgln("LaunchServer: accept failed.");
return;
}
static int s_next_client_id = 0;
int client_id = ++s_next_client_id;
IPC::new_client_connection<SymbolServer::ClientConnection>(client_socket.release_nonnull(), client_id);
};
return event_loop.exec();
}