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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 <AK/MappedFile.h>
#include <LibDebug/DebugInfo.h>
#include <LibELF/Image.h>
#include <SymbolServer/ClientConnection.h>
#include <SymbolServer/SymbolClientEndpoint.h>
namespace SymbolServer {
struct CachedELF {
NonnullRefPtr<MappedFile> mapped_file;
Debug::DebugInfo debug_info;
};
static HashMap<String, OwnPtr<CachedELF>> s_cache;
static HashMap<int, RefPtr<ClientConnection>> s_connections;
ClientConnection::ClientConnection(NonnullRefPtr<Core::LocalSocket> socket, int client_id)
: IPC::ClientConnection<SymbolClientEndpoint, SymbolServerEndpoint>(*this, move(socket), client_id)
{
s_connections.set(client_id, *this);
}
ClientConnection::~ClientConnection()
{
}
void ClientConnection::die()
{
s_connections.remove(client_id());
}
OwnPtr<Messages::SymbolServer::GreetResponse> ClientConnection::handle(const Messages::SymbolServer::Greet&)
{
return make<Messages::SymbolServer::GreetResponse>();
}
OwnPtr<Messages::SymbolServer::SymbolicateResponse> ClientConnection::handle(const Messages::SymbolServer::Symbolicate& message)
{
auto path = message.path();
if (!s_cache.contains(path)) {
auto mapped_file = MappedFile::map(path);
if (mapped_file.is_error()) {
dbgln("Failed to map {}: {}", path, mapped_file.error().string());
s_cache.set(path, {});
return make<Messages::SymbolServer::SymbolicateResponse>(false, String {}, 0, String {}, 0);
}
auto elf = make<ELF::Image>(mapped_file.value()->bytes());
if (!elf->is_valid()) {
dbgln("ELF not valid: {}", path);
s_cache.set(path, {});
return make<Messages::SymbolServer::SymbolicateResponse>(false, String {}, 0, String {}, 0);
}
Debug::DebugInfo debug_info(move(elf));
auto cached_elf = make<CachedELF>(mapped_file.release_value(), move(debug_info));
s_cache.set(path, move(cached_elf));
}
auto it = s_cache.find(path);
VERIFY(it != s_cache.end());
auto& cached_elf = it->value;
if (!cached_elf)
return make<Messages::SymbolServer::SymbolicateResponse>(false, String {}, 0, String {}, 0);
u32 offset = 0;
auto symbol = cached_elf->debug_info.elf().symbolicate(message.address(), &offset);
auto source_position = cached_elf->debug_info.get_source_position(message.address());
String filename;
u32 line_number = 0;
if (source_position.has_value()) {
filename = source_position.value().file_path;
line_number = source_position.value().line_number;
}
return make<Messages::SymbolServer::SymbolicateResponse>(true, symbol, offset, filename, line_number);
}
}
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